APA (7th ed.) Citation

Orr, R. T. (1961). Vertebrate biology. W. B. Saunders.

Chicago Style (17th ed.) Citation

Orr, Robert T. Vertebrate Biology. Philadelphia: W. B. Saunders, 1961.

MLA (9th ed.) Citation

Orr, Robert T. Vertebrate Biology. W. B. Saunders, 1961.