APA (7th ed.) Citation

Wold, R. J. (1979). Maps showing bedrock topography of Lake Superior. The Survey.

Chicago Style (17th ed.) Citation

Wold, Richard J. Maps Showing Bedrock Topography of Lake Superior. Reston, Va.: The Survey, 1979.

MLA (9th ed.) Citation

Wold, Richard J. Maps Showing Bedrock Topography of Lake Superior. The Survey, 1979.