Spring, M., Aderkas, N. v., Rukavina, F., & Peggie, D. (2017). An stronomer by Ferdinand Bol: Materials, Colour Change and Conservation. National Gallery Technical Bulletin : Volume 38.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpring, Marika, Nelly von Aderkas, Flaminia Rukavina, और David Peggie. "An Stronomer by Ferdinand Bol: Materials, Colour Change and Conservation." National Gallery Technical Bulletin : Volume 38 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpring, Marika, et al. "An Stronomer by Ferdinand Bol: Materials, Colour Change and Conservation." National Gallery Technical Bulletin : Volume 38, 2017.
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