Ward, R. E., & Tietema, S. J. (1956). Indians in agriculture. Missouri River Basin Investigations Project, Bureau of Indian Affairs, U.S. Dept. of the Interior.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWard, Ralph E., और Sidney J. Tietema. Indians in Agriculture. Bozeman, Mont.: Missouri River Basin Investigations Project, Bureau of Indian Affairs, U.S. Dept. of the Interior, 1956.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWard, Ralph E., और Sidney J. Tietema. Indians in Agriculture. Missouri River Basin Investigations Project, Bureau of Indian Affairs, U.S. Dept. of the Interior, 1956.
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