American Heritage. (1961). Cowboys and cattle country. Harper and Brothers.
Chicagoスタイル(17版)引用形式American Heritage. Cowboys and Cattle Country. New York: Harper and Brothers, 1961.
MLA(9版)引用形式American Heritage. Cowboys and Cattle Country. Harper and Brothers, 1961.
警告: この引用は必ずしも正確ではありません.