Coombs, P. (2012). Painting with pastels. Search.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoombs, Peter. Painting with Pastels. Tunbridge Wells: Search, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCoombs, Peter. Painting with Pastels. Search, 2012.
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