Παραπομπή APA

Marsland, D. (1964). Principles of modern biology (4th ed.). Holt.

Παραπομπή Chicago Style

Marsland, Douglas. Principles of Modern Biology. 4th ed. New York: Holt, 1964.

Παραπομπή MLA

Marsland, Douglas. Principles of Modern Biology. 4th ed. Holt, 1964.