APA (7th ed.) Citation

(1926). Laying out fields for tractor plowing. GPO.

Chicago Style (17th ed.) Citation

Laying Out Fields for Tractor Plowing. [Washington]: GPO, 1926.

MLA (9th ed.) Citation

Laying Out Fields for Tractor Plowing. GPO, 1926.

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