APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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