APA (7th ed.) Citation

Knapp, B. D. (1987). Soil survey of Allegan County, Michigan. The Service.

Chicago Style (17th ed.) Citation

Knapp, Bruce D. Soil Survey of Allegan County, Michigan. [Washington, D.C.?]: The Service, 1987.

MLA (9th ed.) Citation

Knapp, Bruce D. Soil Survey of Allegan County, Michigan. The Service, 1987.

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