APA (7th ed.) Citation

Hildreth, C. T., & Colton, R. B. (1982). Surficial geologic map of the Hampden quadrangle, Massachusetts and Connecticut. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Hildreth, Carol T., and Roger B. Colton. Surficial Geologic Map of the Hampden Quadrangle, Massachusetts and Connecticut. Reston, Va.: U.S. Geological Survey, 1982.

MLA (9th ed.) Citation

Hildreth, Carol T., and Roger B. Colton. Surficial Geologic Map of the Hampden Quadrangle, Massachusetts and Connecticut. U.S. Geological Survey, 1982.