Guelke, L. (1982). Historical understanding in geography: An idealist approach. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGuelke, Leonard. Historical Understanding in Geography: An Idealist Approach. Cambridge University Press, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGuelke, Leonard. Historical Understanding in Geography: An Idealist Approach. Cambridge University Press, 1982.
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