Ryser, H. J. (1963). Combinatorial mathematics. Mathematical Association of America, distributed by Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyser, Herbert John. Combinatorial Mathematics. Buffalo: Mathematical Association of America, distributed by Wiley, 1963.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRyser, Herbert John. Combinatorial Mathematics. Mathematical Association of America, distributed by Wiley, 1963.
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