Unwin, T. (1992). The place of geography. Longman Scientific & Technical ; Wiley.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnwin, Tim. The Place of Geography. Harlow, Essex, England : New York: Longman Scientific & Technical ; Wiley, 1992.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnwin, Tim. The Place of Geography. Longman Scientific & Technical ; Wiley, 1992.