Marshak, S. (2001). Earth: Portrait of a planet. New York: Norton.
Trích dẫn kiểu ChicagoMarshak, Stephen. Earth: Portrait of a Planet. New York: Norton, 2001.
MLA引文Marshak, Stephen. Earth: Portrait of a Planet. New York: Norton, 2001.
警告：这些引文格式不一定是100％准确.