APA (7th ed.) Citation

Geological Survey (U.S.), Colorado. Mining Industrial Development Board, Tweto, O., Moench, R. H., & Reed, J. C., Jr. (1978). Geologic map of the Leadville 1⁰ x 2⁰ quadrangle, northwestern Colorado. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Colorado. Mining Industrial Development Board, Ogden Tweto, Robert Hadley Moench, and John Calvin Reed, Jr. Geologic Map of the Leadville 1⁰ X 2⁰ Quadrangle, Northwestern Colorado. Reston, Va.: The Survey, 1978.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Leadville 1⁰ X 2⁰ Quadrangle, Northwestern Colorado. The Survey, 1978.