APA (7th ed.) Citation

(1920). Influence of tractor on use of horses (corn belt-191 farms). GPO.

Chicago Style (17th ed.) Citation

Influence of Tractor on Use of Horses (corn Belt-191 Farms). [Washington]: GPO, 1920.

MLA (9th ed.) Citation

Influence of Tractor on Use of Horses (corn Belt-191 Farms). GPO, 1920.