APA (7th ed.) Citation

ScienceDirect (Online service), Marr, C. M., & Bowen, I. M. (2010). Cardiology of the horse (Second edition.). Saunders.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Celia M. Marr, and I. Mark Bowen. Cardiology of the Horse. Second edition. Edinburgh ; New York: Saunders, 2010.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Cardiology of the Horse. Second edition. Saunders, 2010.