University of Edinburgh. Department of Urban Design and Regional Planning. Planning Research Unit & Great Britain. Scottish Development Department. (1973). Threshold analysis manual. Her Majesty's Stationery Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUniversity of Edinburgh. Department of Urban Design and Regional Planning. Planning Research Unit और Great Britain. Scottish Development Department. Threshold Analysis Manual. Edinburgh: Her Majesty's Stationery Office, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUniversity of Edinburgh. Department of Urban Design and Regional Planning. Planning Research Unit और Great Britain. Scottish Development Department. Threshold Analysis Manual. Her Majesty's Stationery Office, 1973.
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