APA (7th ed.) Citation

ScienceDirect (Online service), Wilbur, K. M., & Yonge, C. M. (1966). Physiology of Mollusca. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Karl M. Wilbur, and C. M. Yonge. Physiology of Mollusca. New York: Academic Press, 1966.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Physiology of Mollusca. Academic Press, 1966.