American Society of Civil Engineers. Committee on Operation and Maintenance of Irrigation and Drainage Systems, Johnston, W. R., Robertson, J. B., & Clemmens, A. J. (1991). Management, operation, and maintenance of irrigation and drainage systems (Second edition.). American Society of Civil Engineers. https://doi.org/10.1061/9780872627857
Cita Chicago (17th ed.)American Society of Civil Engineers. Committee on Operation and Maintenance of Irrigation and Drainage Systems, William R. Johnston, James B. Robertson, i Albert J. Clemmens. Management, Operation, and Maintenance of Irrigation and Drainage Systems. Second edition. New York, N.Y: American Society of Civil Engineers, 1991. https://doi.org/10.1061/9780872627857.
Cita MLA (9th ed.)American Society of Civil Engineers. Committee on Operation and Maintenance of Irrigation and Drainage Systems, et al. Management, Operation, and Maintenance of Irrigation and Drainage Systems. Second edition. American Society of Civil Engineers, 1991. https://doi.org/10.1061/9780872627857.