APA (7th ed.) Citation

Geological Survey (U.S.) & Schafer, J. P. (1968). Surficial geologic map of the Ashaway quadrangle, Connecticut-Rhode Island. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and J. P. Schafer. Surficial Geologic Map of the Ashaway Quadrangle, Connecticut-Rhode Island. Reston, Va.: The Survey, 1968.

MLA (9th ed.) Citation

Geological Survey (U.S.) and J. P. Schafer. Surficial Geologic Map of the Ashaway Quadrangle, Connecticut-Rhode Island. The Survey, 1968.