APA (7th ed.) Citation

United States. Department of Agriculture. (1997). USDA rural utilities service directory. [U.S. Dept. of Agriculture].

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. USDA Rural Utilities Service Directory. [Washington, D.C.?]: [U.S. Dept. of Agriculture], 1997.

MLA (9th ed.) Citation

United States. Department of Agriculture. USDA Rural Utilities Service Directory. [U.S. Dept. of Agriculture], 1997.