Marshak Stphen. (2001). Earth: Portrait of a Planet. American: ADBS.
Trích dẫn kiểu ChicagoMarshak Stphen. Earth: Portrait of a Planet. American: ADBS, 2001.
MLA引文Marshak Stphen. Earth: Portrait of a Planet. American: ADBS, 2001.
警告：这些引文格式不一定是100％准确.