APA (7th ed.) Citation

Geological Survey (U.S.). (1988). Galesburg, Illinois--Iowa, 1985: 1:100 000-scale planimetric map : 30 x 60 minute series (planimetric). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Galesburg, Illinois--Iowa, 1985: 1:100 000-scale Planimetric Map : 30 X 60 Minute Series (planimetric). Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.). Galesburg, Illinois--Iowa, 1985: 1:100 000-scale Planimetric Map : 30 X 60 Minute Series (planimetric). The Survey, 1988.