APA (7th ed.) Citation

Hurst, W. M., & Humphries, W. R. (1938). Performance characteristics of 5- and 6-foot combines. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Hurst, W. M., and W. R. Humphries. Performance Characteristics of 5- and 6-foot Combines. Washington: U.S. Dept. of Agriculture, 1938.

MLA (9th ed.) Citation

Hurst, W. M., and W. R. Humphries. Performance Characteristics of 5- and 6-foot Combines. U.S. Dept. of Agriculture, 1938.