APA (7th ed.) Citation

Purchon, R. D. (1977). the biology of the mollusca.

Chicago Style (17th ed.) Citation

Purchon, Richard Denison. The Biology of the Mollusca. 1977.

MLA (9th ed.) Citation

Purchon, Richard Denison. The Biology of the Mollusca. 1977.

Warning: These citations may not always be 100% accurate.