Cita APA (7th ed.)

Kellert, S. R. (1997). Macmillan encyclopedia of the environment. Macmillan Library Reference.

Cita Chicago (17th ed.)

Kellert, Stephen R. Macmillan Encyclopedia of the Environment. New York: Macmillan Library Reference, 1997.

Cita MLA (9th ed.)

Kellert, Stephen R. Macmillan Encyclopedia of the Environment. Macmillan Library Reference, 1997.