Fellmann, J. D., Getis, A., Getis, J., Hawkins, M., & Airriess, C. (2007). Human geography: Landscapes of human activities (Ninth edition.). McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFellmann, Jerome Donald, Arthur Getis, Judith Getis, Michael Hawkins, और Christopher Airriess. Human Geography: Landscapes of Human Activities. Ninth edition. Boston, Massachusetts: McGraw-Hill, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFellmann, Jerome Donald, et al. Human Geography: Landscapes of Human Activities. Ninth edition. McGraw-Hill, 2007.
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