Burberry, P. (1988). Environment and services (6th ed.). Mitchell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurberry, Peter. Environment and Services. 6th ed. London: Mitchell, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBurberry, Peter. Environment and Services. 6th ed. Mitchell, 1988.
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