APA (7th ed.) Citation

(1983). Bedrock geologic map of Massachusetts. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Bedrock Geologic Map of Massachusetts. Reston, VA: U.S. Geological Survey, 1983.

MLA (9th ed.) Citation

Bedrock Geologic Map of Massachusetts. U.S. Geological Survey, 1983.

Warning: These citations may not always be 100% accurate.