APA 양식(APA style, APA 스타일)은 미국심리학회(American Psychological Association: APA)가 정한 문헌 작성 양식이다. 주로 사회과학 분야(심리학, 교육학 등)에서 많이 사용하며, 일부 자연과학 분야(생물학, 식물학, 지구과학)에서도 사용한다. 본문에는 저자-연도 형식으로 인용하고, 논문 끝의 참고문헌 목록을 이름 순으로 정리하는 것이 특징이다.
APA 양식 논문은 보통 다음과 같은 구획으로 구성되며, 각각은 새 쪽으로 시작한다.
- 제목 쪽
- 표 (표마다 새 쪽)
- 그림 캡션
- 그림 (그림마다 새 쪽)
수준별 제목 형식은 다음과 같다. (한글에는 대소문자가 없고 기울임체도 잘 쓰이지 않기 때문에 제목 형식을 따르는 경우는 별로 없다.)
- 1수준: Centered Uppercase and Lowercase Heading
- 2수준: Ideal Institute of Technology
- 3수준: Engineering college
- 4수준: Indented, italicized, lowercase paragraph heading ending with a period.
- 5수준: CENTERED UPPERCASE HEADING
본문 중에 저자명, 간행연도, 페이지 등을 괄호로 묶어 표시하고(예: 홍길동, 2000), 논문 끝의 참고문헌에서 찾아볼 수 있도록 한다.
- 저자 1명
- A recent study found a possible genetic cause of alcoholism (Pauling, 2005).
- Pauling (2005) discovered a possible genetic cause of alcoholism.
- 저자 2명
- A recent study found a possible genetic cause of alcoholism (Pauling & Liu, 2005).
- Pauling and Liu (2005) discovered a possible genetic cause of alcoholism.
- 저자 3~5명
- A recent study found a possible genetic cause of alcoholism (Pauling, Liu, & Guo, 2005).
- Pauling, Liu, and Guo (2005) conducted a study that discovered a possible genetic cause of alcoholism.
- Pauling et al. (2005) discovered a possible genetic cause of alcoholism.
- A recent study found a possible genetic cause of alcoholism (Pauling et al., 2005).
- 저자 6명 이상
- Pauling et al. (2005) discovered a possible genetic cause of alcoholism.
- 직접 인용
- When asked why his behavior had changed so dramatically, Max simply said, "I think it's the reinforcement" (Pauling, 2004, p. 69).
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- 1명이 저술한 책
- Sheril, R. D. (1956). The terrifying future: Contemplating color television. San Diego: Halstead.
- 2명 이상이 저술한 책
- Smith, J., & Peter, Q. (1992). Hairball: An intensive peek behind the surface of an enigma. Hamilton, ON: McMaster University Press.
- 편집된 책의 기사
- Mcdonalds, A. (1993). Practical methods for the apprehension and sustained containment of supernatural entities. In G. L. Yeager (Ed.), Paranormal and occult studies: Case studies in application (pp. 42–64). London: OtherWorld Books.
- 학술지에 실린, 개별적으로 쪽이 매겨진 논문
- Crackton, P. (1987). The Loonie: God's long-awaited gift to colourful pocket change? Canadian Change, 64(7), 34–37.
- 학술지에 실린, 연속적으로 쪽이 매겨진 논문
- Rottweiler, F. T., & Beauchemin, J. L. (1987). Detroit and Narnia: Two foes on the brink of destruction. Canadian/American Studies Journal, 54, 66-146.
- 주간지 기사
- Henry, W. A., III. (1990, April 9). Making the grade in today's schools. Time, 135, 28–31.
- 신문 기사
- Wrong, M. (2005, August 17). "Never Gonna Give You Up" says Mayor. Toronto Sol, p. 4.
- 정부 문서
- Revenue Canada. (2001). Advanced gouging: Manual for employees (MP 65–347/1124). Ottawa: Minister of Immigration and Revenue.
- 인쇄물이 원본인 인터넷 문서 (원본 형식 그대로인 것)
- Marlowe, P., Spade, S., & Chan, C. (2001). Detective work and the benefits of colour versus black and white [Electronic version]. Journal of Pointless Research, 11, 123–124.
- 인쇄물이 원본인 인터넷 문서 (원본과 형식이 다른 것)
- Marlowe, P., Spade, S., & Chan, C. (2001). Detective work and the benefits of colour versus black and white. Journal of Pointless Research, 11, 123–124. Retrieved October 25, 2007, from http://www.pointlessjournal.com/colour_vs_black_and_white.html
- 인터넷판만 있는 저널의 논문
- Blofeld, E. S. (1994, March 1). Expressing oneself through Persian cats and modern architecture. Felines & Felons, 4, Article 0046g. Retrieved October 3, 1999, from http://journals.f+f.org/spectre/vblofeld-0046g.html
- 인터넷판만 있는 신문의 기사
- Paradise, S., Moriarty, D., Marx, C., Lee, O. B., Hassel, E., et al. (1957, July). Portrayals of fictional characters in reality-based popular writing: Project update. Off the Beaten Path, 7 (3). Retrieved October 3, 1999, from http://www.newsletter.offthebeatenpath.news/otr/complaints.html
- 저자 및 작성일이 표시되지 않은 독자적 인터넷 문서
- What I did today. (n.d.). Retrieved August 21, 2002, from http://www.cc.mystory.life/blog/didtoday.html [Fictional entry.]
- 대학교 교육 프로그램 웹사이트의 문서
- Rogers, B. (2078). Faster-than-light travel: What we've learned in the first twenty years. Retrieved August 24, 2079, from Mars University, Institute for Martian Studies Web site, http://www.eg.spacecentraltoday.mars/university/dept.html [Fictional entry.]
- 저널 논문의 전자복제본, 3~5명 저자, retrieved from database
- Costanza, G., Seinfeld, J., Benes, E., Kramer, C., & Peterman, J. (1993). Minutiæ and insignificant observations from the nineteen-nineties. Journal about Nothing, 52, 475–649. Retrieved October 31, 1999, from NoTHINGJournals database. [Fictional entry.]
- 전자우편 또는 기타 개인적인 의견교환
- (A. Monterey, personal communication, September 28, 2001)
- CD 책
- Nix, G. (2002). Lirael, Daughter of the Clayr [CD]. New York: Random House/Listening Library.
- 테이프 책
- Nix, G. (2002). Lirael, Daughter of the Clayr [Cassette Recording No. 1999-1999-1999]. New York: Random House/Listening Library.
- Gilby, A. (Producer), & Schlesinger, J. (Director). (1995). Cold comfort farm [Motion picture]. Universal City, CA: MCA Universal Home Video.
- APA 양식에서는 웹사이트(website) 대신 웹 사이트(Web site)로 표기한다.
- APA Style. April 28, 2012에 확인. 홈페이지.