APA (7e ed.) Bronvermelding
Maps.com (Firm) & ebrary, Inc. (2000). U.S. expansion and the Alaska Purchase, 1867. Maps.com.
Chicago (17e ed.) Bronvermelding
Maps.com (Firm) en Inc ebrary. U.S. Expansion and the Alaska Purchase, 1867. [S.l.]: Maps.com, 2000.
MLA (9e ed.) Bronvermelding
Maps.com (Firm) en Inc ebrary. U.S. Expansion and the Alaska Purchase, 1867. Maps.com, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.