United States Information Service. (1975). An outline of American geography. United States Information Agency.
Chicago-Zitierstil (17. Ausg.)United States Information Service. An Outline of American Geography. Nueva York: United States Information Agency, 1975.
MLA-Zitierstil (9. Ausg.)United States Information Service. An Outline of American Geography. United States Information Agency, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.