APA (7th ed.) Citation

(1919). Frogs: Their natural history and utilization. GPO.

Chicago Style (17th ed.) Citation

Frogs: Their Natural History and Utilization. [Washington]: GPO, 1919.

MLA (9th ed.) Citation

Frogs: Their Natural History and Utilization. GPO, 1919.

Warning: These citations may not always be 100% accurate.