APA (7th ed.) Citation

Geological Survey (U.S.). (1994). Ada, Minnesota--North Dakota, 1984: 1:100 000-scale metric topographic map : 30 x 60 minute series (topographic) (Photoinspected 1991.). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Ada, Minnesota--North Dakota, 1984: 1:100 000-scale Metric Topographic Map : 30 X 60 Minute Series (topographic). Photoinspected 1991. Reston, Va.: The Survey, 1994.

MLA (9th ed.) Citation

Geological Survey (U.S.). Ada, Minnesota--North Dakota, 1984: 1:100 000-scale Metric Topographic Map : 30 X 60 Minute Series (topographic). Photoinspected 1991. The Survey, 1994.