↑Bashe, Philip (1985). 《Heavy Metal Thunder: The Music, Its History, Its Heroes》. Doubleday. ISBN978-0-385-19797-7. Besides his inspired phrasing and his extemporaneous howls and asides, Plant could convincingly convey slow blues ("You Shook Me"), gutbucket rock & roll ("Rock and Roll"), and even folk ballads ("Going to California"), in a strong, cutting voice
↑ 가나Schuman, Michael A. (2009). 《Led Zeppelin: Legendary Rock Band》. Enslow Publishers. ISBN978-0-7660-3026-8. The fourth album also has its share of hard rock tracks. Three that received a lot of radio airplay are "Black Dog," "Misty Mountain Hop," and the appropriately named "Rock and Roll."