APA (7th ed.) Citation

United States. Department of Agriculture. (2012). Secretaries of Agriculture: 30 leaders, 150 years. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Secretaries of Agriculture: 30 Leaders, 150 Years. [Washington, D.C.]: U.S. Dept. of Agriculture, 2012.

MLA (9th ed.) Citation

United States. Department of Agriculture. Secretaries of Agriculture: 30 Leaders, 150 Years. U.S. Dept. of Agriculture, 2012.