APA (7th ed.) Citation

Sims, P. K., & Day, W. C. (1993). Great Lakes tectonic zone: Revisited. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Sims, P. K., and Warren C. Day. Great Lakes Tectonic Zone: Revisited. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey, 1993.

MLA (9th ed.) Citation

Sims, P. K., and Warren C. Day. Great Lakes Tectonic Zone: Revisited. U.S. Department of the Interior, U.S. Geological Survey, 1993.