APA (7th ed.) Citation

Lewis, B. P., & Wilken, L. O. (1982). Veterinary drug index. Saunders.

Chicago Style (17th ed.) Citation

Lewis, Benjamin P., and Leon O. Wilken. Veterinary Drug Index. Philadelphia: Saunders, 1982.

MLA (9th ed.) Citation

Lewis, Benjamin P., and Leon O. Wilken. Veterinary Drug Index. Saunders, 1982.