APA (7th ed.) Citation

ScienceDirect (Online service), O'Day, D. H., & Horgen, P. A. (1981). Sexual interactions in eukaryotic microbes. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Danton H. O'Day, and Paul A. Horgen. Sexual Interactions in Eukaryotic Microbes. New York: Academic Press, 1981.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Sexual Interactions in Eukaryotic Microbes. Academic Press, 1981.