APA (7th ed.) Citation

ScienceDirect (Online service), Bennett, E. S., & Hom, M. M. (2004). Manual of gas permeable contact lenses (2nd ed.). Butterworth-Heinemann.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Edward S. Bennett, and Milton M. Hom. Manual of Gas Permeable Contact Lenses. 2nd ed. St. Louis: Butterworth-Heinemann, 2004.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Manual of Gas Permeable Contact Lenses. 2nd ed. Butterworth-Heinemann, 2004.