APA (7th ed.) Citation

ScienceDirect (Online service), Norris, D. O., & Lopez, K. H. (2011). Hormones and reproduction of vertebrates. Academic.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), David O. Norris, and Kristin H. Lopez. Hormones and Reproduction of Vertebrates. Amsterdam ; Boston: Academic, 2011.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Hormones and Reproduction of Vertebrates. Academic, 2011.