APA (7th ed.) Citation

Walker, B., & Weiss, W. (1971). Tropical fish identifier. Sterling.

Chicago Style (17th ed.) Citation

Walker, Braz, and Waltraud Weiss. Tropical Fish Identifier. New York: Sterling, 1971.

MLA (9th ed.) Citation

Walker, Braz, and Waltraud Weiss. Tropical Fish Identifier. Sterling, 1971.