APA(7版)引用形式
Maps.com (Firm) & ebrary, Inc. (2000). U.S. expansion and the Alaska Purchase, 1867. Maps.com.
Chicagoスタイル(17版)引用形式
Maps.com (Firm) , Inc ebrary. U.S. Expansion and the Alaska Purchase, 1867. [S.l.]: Maps.com, 2000.
MLA(9版)引用形式
Maps.com (Firm) , Inc ebrary. U.S. Expansion and the Alaska Purchase, 1867. Maps.com, 2000.
警告: この引用は必ずしも正確ではありません.