Olson, S. F. (1998). Open horizons (1st University of Minnesota ed.). University of Minnesota Press.
Chicagoスタイル(17版)引用形式Olson, Sigurd F. Open Horizons. 1st University of Minnesota ed. Minneapolis: University of Minnesota Press, 1998.
MLA(9版)引用形式Olson, Sigurd F. Open Horizons. 1st University of Minnesota ed. University of Minnesota Press, 1998.
警告: この引用は必ずしも正確ではありません.