APA (7th ed.) Citation

Geological Survey (U.S.) & Johnson, R. B. (1974). Geologic map of the Fort Union quadrangle, Mora County, New Mexico. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Ross B. Johnson. Geologic Map of the Fort Union Quadrangle, Mora County, New Mexico. Reston, Va.: U.S. Geological Survey, 1974.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Ross B. Johnson. Geologic Map of the Fort Union Quadrangle, Mora County, New Mexico. U.S. Geological Survey, 1974.