Marshak, S., & Prothero, D. R. Earth: Portrait of a planet.
芝加哥风格引文Marshak, Stephen, 与 Donald R. Prothero. Earth: Portrait of a Planet.
MLA引文Marshak, Stephen, 与 Donald R. Prothero. Earth: Portrait of a Planet.
警告：这些引文格式不一定是100％准确.
APA引文