APA

Berlin B., Breedlove D. E. & Raven P. H. (1974). Principles of tzeltal plant classification. New York, New York, United States: Academic Press.

Chicago

Berlin Brent, Breedlove Dennis E and Raven Peter H. 1974. Principles of tzeltal plant classification. New York, New York, United States: Academic Press.

Harvard

Berlin B., Breedlove D. E. and Raven P. H. (1974). Principles of tzeltal plant classification. New York, New York, United States: Academic Press.

MLA

Berlin Brent, Breedlove Dennis E and Raven Peter H. Principles of tzeltal plant classification. New York, New York, United States: Academic Press. 1974.