Unesco. (1973). Irrigation, drainage and salinity: An international source book. Paris : Unesco.
Chicago-referens (17:e uppl.)Unesco. Irrigation, Drainage and Salinity: An International Source Book. Paris : Unesco, 1973.
MLA-referens (9:e uppl.)Unesco. Irrigation, Drainage and Salinity: An International Source Book. Paris : Unesco, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.