Cita APA

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

Citación estilo Chicago

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

Cita MLA

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