APA (7th ed.) Citation

Cushman, R. V., & Colton, R. B. (1963). Contour map of the bedrock surface of the Broad Brook quadrangle, Connecticut. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Cushman, R. V., and Roger B. Colton. Contour Map of the Bedrock Surface of the Broad Brook Quadrangle, Connecticut. Washington: U.S. Dept. of the Interior, Geological Survey, 1963.

MLA (9th ed.) Citation

Cushman, R. V., and Roger B. Colton. Contour Map of the Bedrock Surface of the Broad Brook Quadrangle, Connecticut. U.S. Dept. of the Interior, Geological Survey, 1963.