APA (7th ed.) Citation

Smith, L. A., Barker, G. L., & Colwick, R. F. (1981). Instrumentation used to monitor energy requirements for agricultural field operations. American Society of Agricultural Engineers.

Chicago Style (17th ed.) Citation

Smith, L. A., G. L. Barker, and R. F. Colwick. Instrumentation Used to Monitor Energy Requirements for Agricultural Field Operations. St. Joseph, Mich.: American Society of Agricultural Engineers, 1981.

MLA (9th ed.) Citation

Smith, L. A., et al. Instrumentation Used to Monitor Energy Requirements for Agricultural Field Operations. American Society of Agricultural Engineers, 1981.