Cita APA (7a ed.)

Ehrenfeld, D. W. (1970). Biological conservation. Holt, Rinehart and Winston.

Cita Chicago Style (17a ed.)

Ehrenfeld, David W. Biological Conservation. Toronto: Holt, Rinehart and Winston, 1970.

Cita MLA (9a ed.)

Ehrenfeld, David W. Biological Conservation. Holt, Rinehart and Winston, 1970.