APA (7th ed.) Citation

United States Housing Authority. (1939). Policy and Procedure Bulletin No. 25: Sub-Surface Soil Investigation. [s.n.].

Chicago Style (17th ed.) Citation

United States Housing Authority. Policy and Procedure Bulletin No. 25: Sub-Surface Soil Investigation. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States Housing Authority. Policy and Procedure Bulletin No. 25: Sub-Surface Soil Investigation. [s.n.], 1939.