Gaya APA

Kellert, S, R. (1997). Macmillan encyclopedia of the environment Vol. 6 (vol. 6). New York: Simon & Schuster macmillan.

Gaya MLA

Kellert, Stephen, R. "Macmillan encyclopedia of the environment Vol. 6". vol. 6 New York: Simon & Schuster macmillan, 1997. ML.