APA (7th ed.) Citation

ScienceDirect (Online service), Manske, R. H. F., & Brossi, A. (1983). The alkaloids. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), R. H. F. Manske, and Arnold Brossi. The Alkaloids. New York ; London: Academic Press, 1983.

MLA (9th ed.) Citation

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