Cottrell, R. C. (2006). Smokejumpers of the Civilian Public Service in World War II: Conscientious objectors as firefighters for the National Forest Service. McFarland & Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCottrell, Robert C. Smokejumpers of the Civilian Public Service in World War II: Conscientious Objectors as Firefighters for the National Forest Service. Jefferson, N.C.: McFarland & Co., 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCottrell, Robert C. Smokejumpers of the Civilian Public Service in World War II: Conscientious Objectors as Firefighters for the National Forest Service. McFarland & Co., 2006.
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