APA (7 वां संस्करण) प्रशस्ति पत्र
Flippen, J. B. (2006). Conservative conservationist: Russell E. Train and the emergence of American environmentalism. Louisiana State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Flippen, J. Brooks. Conservative Conservationist: Russell E. Train and the Emergence of American Environmentalism. Baton Rouge: Louisiana State University Press, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Flippen, J. Brooks. Conservative Conservationist: Russell E. Train and the Emergence of American Environmentalism. Louisiana State University Press, 2006.
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