APA (7th ed.) Citation

Smith, H. (1984). General soil map of the northeastern United States. USDA-SCS.

Chicago Style (17th ed.) Citation

Smith, Horace. General Soil Map of the Northeastern United States. Forth Worth, Tex.: USDA-SCS, 1984.

MLA (9th ed.) Citation

Smith, Horace. General Soil Map of the Northeastern United States. USDA-SCS, 1984.

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