APA (7th ed.) Citation

ScienceDirect (Online service), Saleuddin, A. S. M., & Wilbur, K. M. (1983). The mollusca. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), A. S. M. Saleuddin, and Karl M. Wilbur. The Mollusca. New York ; London: Academic Press, 1983.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. The Mollusca. Academic Press, 1983.