APA (7th ed.) Citation

Schwartz, G. M. (1949). The geology of the Duluth Metropolitan Area. University of Minnesota Press.

Chicago Style (17th ed.) Citation

Schwartz, George M. The Geology of the Duluth Metropolitan Area. Minneapolis: University of Minnesota Press, 1949.

MLA (9th ed.) Citation

Schwartz, George M. The Geology of the Duluth Metropolitan Area. University of Minnesota Press, 1949.