Keevash, P. (2020). Coloured and directed designs. Springer-Verlag Berlin Heidelberg.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeevash, P. Coloured and Directed Designs. Springer-Verlag Berlin Heidelberg, 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKeevash, P. Coloured and Directed Designs. Springer-Verlag Berlin Heidelberg, 2020.
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