APA (7th ed.) Citation

Purchon, R. (1976). The biology of the mollusca. Pergamon Press.

Chicago Style (17th ed.) Citation

Purchon, R.D. The Biology of the Mollusca. Oxford, U.K: Pergamon Press, 1976.

MLA (9th ed.) Citation

Purchon, R.D. The Biology of the Mollusca. Pergamon Press, 1976.