APA (7th ed.) Citation

World Meteorological Organization. (1981). Guide to hydrological practices (4th ed.). Secretariat of the WMO.

Chicago Style (17th ed.) Citation

World Meteorological Organization. Guide to Hydrological Practices. 4th ed. Geneva, Switzerland: Secretariat of the WMO, 1981.

MLA (8th ed.) Citation

World Meteorological Organization. Guide to Hydrological Practices. 4th ed. Secretariat of the WMO, 1981.

Warning: These citations may not always be 100% accurate.