APA (7th ed.) Citation

Orr, R. T. (1966). Vertebrate biology (2d ed.). Saunders.

Chicago Style (17th ed.) Citation

Orr, Robert T. Vertebrate Biology. 2d ed. Philadelphia: Saunders, 1966.

MLA (9th ed.) Citation

Orr, Robert T. Vertebrate Biology. 2d ed. Saunders, 1966.