Cita APA (7a ed.)

Ojakangas, R. W., & Matsch, C. L. (1982). Minnesota's Geology. University of Minnesota Press.

Cita Chicago Style (17a ed.)

Ojakangas, Richard W., y Charles L. Matsch. Minnesota's Geology. Minneapolis: University of Minnesota Press, 1982.

Cita MLA (8a ed.)

Ojakangas, Richard W., y Charles L. Matsch. Minnesota's Geology. University of Minnesota Press, 1982.