Wieczynski, J. L. (1983). Regulations on Overland Trade - Rudzutak, Yan Ernestovich. Acad. Int. Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWieczynski, Joseph L. Regulations on Overland Trade - Rudzutak, Yan Ernestovich. Gulf Breeze: Acad. Int. Press, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWieczynski, Joseph L. Regulations on Overland Trade - Rudzutak, Yan Ernestovich. Acad. Int. Press, 1983.
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