APA (7th ed.) Citation

Kellner, O. (1926). The scientific feeding of animals (2nd ed. rev.). Duckworth.

Chicago Style (17th ed.) Citation

Kellner, O. The Scientific Feeding of Animals. 2nd ed. rev. London: Duckworth, 1926.

MLA (8th ed.) Citation

Kellner, O. The Scientific Feeding of Animals. 2nd ed. rev. Duckworth, 1926.