APA (7th ed.) Citation
Walker W. R. (1989). Guidelines for designing and evaluating surface irrigation systems. FAO.
Chicago Style (17th ed.) Citation
Walker W. R. Guidelines for Designing and Evaluating Surface Irrigation Systems. FAO, 1989.
MLA (9th ed.) Citation
Walker W. R. Guidelines for Designing and Evaluating Surface Irrigation Systems. FAO, 1989.
Warning: These citations may not always be 100% accurate.