Robert E Ricklefs. (1990). Ecology. New York: W. H. Freeman.
Trích dẫn kiểu ChicagoRobert E Ricklefs. Ecology. New York: W. H. Freeman, 1990.
MLA引文Robert E Ricklefs. Ecology. New York: W. H. Freeman, 1990.
警告：這些引文格式不一定是100％准確.
APA引文