Downs, H. W., & Hansen, R. (1979). Selecting energy-efficient tractors using the Nebraska tractor test reports. Colorado State University Extension Service.
Chicago Style (17th ed.) CitationDowns, H. Willard, and Ralph Hansen. Selecting Energy-efficient Tractors Using the Nebraska Tractor Test Reports. Fort Collins, Colo.: Colorado State University Extension Service, 1979.
MLA (9th ed.) CitationDowns, H. Willard, and Ralph Hansen. Selecting Energy-efficient Tractors Using the Nebraska Tractor Test Reports. Colorado State University Extension Service, 1979.
Warning: These citations may not always be 100% accurate.