Orth, D. J., & Payne, R. L. (1987). The National Geographic Names Data Base: Phase II instructions. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationOrth, Donald J., and Roger L. Payne. The National Geographic Names Data Base: Phase II Instructions. Denver CO: Department of the Interior, U.S. Geological Survey, 1987.
MLA (9th ed.) CitationOrth, Donald J., and Roger L. Payne. The National Geographic Names Data Base: Phase II Instructions. Department of the Interior, U.S. Geological Survey, 1987.
Warning: These citations may not always be 100% accurate.