Style de citation APA

Brussard, P. F., & Tull, J. C. (2007). Conservation biology and four types of advocacy. Conservation biology : the journal of the Society for Conservation Biology, 21(1), 21.

Style de citation Chicago

Brussard, Peter F., et John C. Tull. "Conservation Biology and Four Types of Advocacy." Conservation Biology : The Journal of the Society for Conservation Biology 21, no. 1 (2007): 21.

Style de citation MLA

Brussard, Peter F., et John C. Tull. "Conservation Biology and Four Types of Advocacy." Conservation Biology : The Journal of the Society for Conservation Biology, vol. 21, no. 1, 2007, p. 21.