Opler, M. E. (2019). Grenville Goodwin Among the Western Apache: Letters from the Field. University of Arizona Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOpler, Morris E. Grenville Goodwin Among the Western Apache: Letters from the Field. University of Arizona Press, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रOpler, Morris E. Grenville Goodwin Among the Western Apache: Letters from the Field. University of Arizona Press, 2019.
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