APA (7th ed.) Citation

ScienceDirect (Online service), Hoar, W. S., Randall, D. J., & Farrell, A. P. (1992). The cardiovascular system. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), William Stewart Hoar, David J. Randall, and Anthony Peter Farrell. The Cardiovascular System. San Diego: Academic Press, 1992.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. The Cardiovascular System. Academic Press, 1992.