APA (7th ed.) Citation

Geological Survey (U.S.). National Mapping Division. (1984). Index to small-scale maps of the United States: 1:250,000-scale quadrangles, 1:1,000,000-scale maps, 1:2,000,000-scale sectional maps, state maps, U.S. maps : March 1, 1986. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). National Mapping Division. Index to Small-scale Maps of the United States: 1:250,000-scale Quadrangles, 1:1,000,000-scale Maps, 1:2,000,000-scale Sectional Maps, State Maps, U.S. Maps : March 1, 1986. Reston, Va.: The Survey, 1984.

MLA (9th ed.) Citation

Geological Survey (U.S.). National Mapping Division. Index to Small-scale Maps of the United States: 1:250,000-scale Quadrangles, 1:1,000,000-scale Maps, 1:2,000,000-scale Sectional Maps, State Maps, U.S. Maps : March 1, 1986. The Survey, 1984.