Cita APA (7a ed.)

Clark, M. E. (1973). Contemporany biology: Concepts and implications. Saunders.

Cita Chicago Style (17a ed.)

Clark, Mary E. Contemporany Biology: Concepts and Implications. Philadelphia, Pa.: Saunders, 1973.

Cita MLA (8a ed.)

Clark, Mary E. Contemporany Biology: Concepts and Implications. Saunders, 1973.