Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Hoffman, Glenn J., Robert G. Evans, Marvin E. Jensen, Derrel L. Martin, i Ronald L. Elliott. Design and Operation of Farm Irrigation Systems. 2a. ed. St. Joseph, Michigan, USA: American Society of Agricultural and Biological Engineers, 2007.

Cita MLA (9th ed.)

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