APA (7th ed.) Citation

United States. Geological Survey & Berqiost. Wempmaj E. (1981). Worldwide directory of national earth-science agencies and related international organizations. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

United States. Geological Survey and Berqiost. Wempmaj E. Worldwide Directory of National Earth-science Agencies and Related International Organizations. Alexandria, VA: U.S. Geological Survey, 1981.

MLA (9th ed.) Citation

United States. Geological Survey and Berqiost. Wempmaj E. Worldwide Directory of National Earth-science Agencies and Related International Organizations. U.S. Geological Survey, 1981.