APA aipamena

Robert E Ricklifs. (1990). Ecology. New York: W.H. Freeman and Co.

Chicago Style aipamena

Robert E Ricklifs. Ecology. New York: W.H. Freeman and Co, 1990.

MLA aipamena

Robert E Ricklifs. Ecology. New York: W.H. Freeman and Co, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.