APA (7th ed.) Citation

Coffey, G. N. (1912). A Study of the soils of the United States. Gov. Pr. Off.

Chicago Style (17th ed.) Citation

Coffey, George Nelson. A Study of the Soils of the United States. Washington: Gov. Pr. Off, 1912.

MLA (9th ed.) Citation

Coffey, George Nelson. A Study of the Soils of the United States. Gov. Pr. Off, 1912.

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