Cita APA (7th ed.)

Hoffman, G. J., Evans, R. G., Jensen, M. E., Jensen, D. L. x., & Elliott, R. L. (2007). Design and operation of farm irrigation systems (2nd ed.). American Society of Agricultural and Biological Engineers.

Cita Chicago (17th ed.)

Hoffman, Glenn J., Robert G. Evans, Marvin Eli Jensen, Derrel L. x. Jensen, i Ronald L. Elliott. Design and Operation of Farm Irrigation Systems. 2nd ed. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2007.

Cita MLA (8th ed.)

Hoffman, Glenn J., et al. Design and Operation of Farm Irrigation Systems. 2nd ed. American Society of Agricultural and Biological Engineers, 2007.