APA استشهاد

Christiansen. (1977). Theories of populations in biological communities. Springer-Verlag.

استشهاد بنمط شيكاغو

Christiansen. Theories of Populations in Biological Communities. New York: Springer-Verlag, 1977.

MLA استشهاد

Christiansen. Theories of Populations in Biological Communities. Springer-Verlag, 1977.