Não informado. (1911). Annals of the Association of American Geographers. Association of American Geographers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annals of the Association of American Geographers. Washington: Association of American Geographers, 1911.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annals of the Association of American Geographers. Association of American Geographers, 1911.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.