Cita APA (7a ed.)

Olson, S. F. (1998). Open Horizons (1st University of Minnesota ed.). University of Minnesota Press.

Cita Chicago Style (17a ed.)

Olson, Sigurd F. Open Horizons. 1st University of Minnesota ed. Minneapolis: University of Minnesota Press, 1998.

Cita MLA (8a ed.)

Olson, Sigurd F. Open Horizons. 1st University of Minnesota ed. University of Minnesota Press, 1998.