APA (7th ed.) Citation

Downs, H. W., & Hansen, R. (1979). Matching tractor and implement sizes. Colorado State University Extension Service.

Chicago Style (17th ed.) Citation

Downs, H. Willard, and Ralph Hansen. Matching Tractor and Implement Sizes. Fort Collins, Colo.: Colorado State University Extension Service, 1979.

MLA (9th ed.) Citation

Downs, H. Willard, and Ralph Hansen. Matching Tractor and Implement Sizes. Colorado State University Extension Service, 1979.