APA (7th ed.) Citation

Geological Survey (U.S.), State Geological and Natural History Survey of Connecticut, Peper, J. D., & Pease, M. H., Jr. (1975). Geologic map of the Westford quadrangle, Connecticut. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), State Geological and Natural History Survey of Connecticut, John D. Peper, and Maurice H. Pease, Jr. Geologic Map of the Westford Quadrangle, Connecticut. Reston, Va.: The Survey, 1975.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geologic Map of the Westford Quadrangle, Connecticut. The Survey, 1975.