APA

Ehrlich P. R., Roughgarden J., . (1987). The science of ecology. New York: Macmillan.

Chicago

Ehrlich Paul R, Roughgarden Jonathan, . 1987. The science of ecology. New York: Macmillan.

Harvard

Ehrlich P. R., Roughgarden J., . (1987). The science of ecology. New York: Macmillan.

MLA

Ehrlich Paul R, Roughgarden Jonathan, . The science of ecology. New York: Macmillan. 1987.