Citazione Stile APA (7a Edizione)

Smith, R. L. (1995). Ecology and field biology (5th ed.). Harper Collins.

Citazione stile Chigago Style (17a edizione)

Smith, Robert Leo. Ecology and Field Biology. 5th ed. New York: Harper Collins, 1995.

Citatione MLA (9a ed.)

Smith, Robert Leo. Ecology and Field Biology. 5th ed. Harper Collins, 1995.