Association of American Geographers Commission on College Geography. (1975). Resource papers for college geography.
Chicago-Zitierstil (17. Ausg.)Association of American Geographers Commission on College Geography. Resource Papers for College Geography. Washington, DC, 1975.
MLA-Zitierstil (9. Ausg.)Association of American Geographers Commission on College Geography. Resource Papers for College Geography. 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.