Παραπομπή APA

World Meteorological Organization. (1975). WMO.Technical Note: 138.Drought and agriculture. World Meteorological Organization.

Παραπομπή Chicago Style

World Meteorological Organization. WMO.Technical Note: 138.Drought and Agriculture. Geneva: World Meteorological Organization, 1975.

Παραπομπή MLA

World Meteorological Organization. WMO.Technical Note: 138.Drought and Agriculture. World Meteorological Organization, 1975.