Cita APA (7a ed.)

Gardiner, M. S. (1952). The principles of general biology. Macmillan.

Cita Chicago Style (17a ed.)

Gardiner, Mary S. The Principles of General Biology. New York: Macmillan, 1952.

Cita MLA (9a ed.)

Gardiner, Mary S. The Principles of General Biology. Macmillan, 1952.