Swibold, D. L. (2006). Copper chorus: Mining, politics, and the Montana press, 1889-1959. Montana Historical Society Press ; Distributed by Globe Pequot Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSwibold, Dennis L. Copper Chorus: Mining, Politics, and the Montana Press, 1889-1959. Helena, Mont. : Guilford, Conn.: Montana Historical Society Press ; Distributed by Globe Pequot Press, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSwibold, Dennis L. Copper Chorus: Mining, Politics, and the Montana Press, 1889-1959. Montana Historical Society Press ; Distributed by Globe Pequot Press, 2006.
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