APA (7th ed.) Citation

Mertens, T. R., & Lines, J. L. (1978). Principles of biosystematics (2d ed.). Educational Methods.

Chicago Style (17th ed.) Citation

Mertens, Thomas Robert, and Judy Longley Lines. Principles of Biosystematics. 2d ed. Chicago: Educational Methods, 1978.

MLA (9th ed.) Citation

Mertens, Thomas Robert, and Judy Longley Lines. Principles of Biosystematics. 2d ed. Educational Methods, 1978.