Collins, J. (2021). Colour demystified: A complete guide to mixing and using watercolours. Search Press Limited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCollins, Julie. Colour Demystified: A Complete Guide to Mixing and Using Watercolours. Tunbridge Wells (England): Search Press Limited, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCollins, Julie. Colour Demystified: A Complete Guide to Mixing and Using Watercolours. Search Press Limited, 2021.
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