Não informado. (1911). Annals of the Association of American Geographers. Association of American Geographers.
Chicago-Zitierstil (17. Ausg.)Não informado. Annals of the Association of American Geographers. Washington: Association of American Geographers, 1911.
MLA-Zitierstil (8. Ausg.)Não informado. Annals of the Association of American Geographers. Association of American Geographers, 1911.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.