APA (7th ed.) Citation

Gunn, C. R. (1971). Seeds of native and naturalized vetches of North America. U.S. Dept. of Agriculture, Agricultural Research Service.

Chicago Style (17th ed.) Citation

Gunn, Charles R. Seeds of Native and Naturalized Vetches of North America. Washington, D.C.: U.S. Dept. of Agriculture, Agricultural Research Service, 1971.

MLA (9th ed.) Citation

Gunn, Charles R. Seeds of Native and Naturalized Vetches of North America. U.S. Dept. of Agriculture, Agricultural Research Service, 1971.