APA (7th ed.) Citation

United States. Bureau of Soils. (1911). Soils of eastern U.S. and their use: XVII. Porters loam and Porters black loam. GPO.

Chicago Style (17th ed.) Citation

United States. Bureau of Soils. Soils of Eastern U.S. and Their Use: XVII. Porters Loam and Porters Black Loam. [Washington]: GPO, 1911.

MLA (9th ed.) Citation

United States. Bureau of Soils. Soils of Eastern U.S. and Their Use: XVII. Porters Loam and Porters Black Loam. GPO, 1911.