APA (7th ed.) Citation

Butler, J. L., Sumner, H. R., & Burton, G. W. (1967). Forage plot harvester. United States Department of Agriculture, Agricultural Research Service.

Chicago Style (17th ed.) Citation

Butler, James Lee, H. R. Sumner, and Glenn W. Burton. Forage Plot Harvester. Washington, D.C.: United States Department of Agriculture, Agricultural Research Service, 1967.

MLA (9th ed.) Citation

Butler, James Lee, et al. Forage Plot Harvester. United States Department of Agriculture, Agricultural Research Service, 1967.