APA (7th ed.) Citation

Leverett, F., Sardeson, F. W., & Purssell, U. G. (1917). Surface formations and agricultural conditions of northeastern Minnesota. The University of Minnesota.

Chicago Style (17th ed.) Citation

Leverett, Frank, Frederick William Sardeson, and Ulysses G. Purssell. Surface Formations and Agricultural Conditions of Northeastern Minnesota. Minneapolis: The University of Minnesota, 1917.

MLA (9th ed.) Citation

Leverett, Frank, et al. Surface Formations and Agricultural Conditions of Northeastern Minnesota. The University of Minnesota, 1917.