Dellenbaugh, F. S. (1905). Breaking the wilderness: The story of the conquest of the far West, from the wanderings of Cabeza de Vaca, to the first descent of the Colorado by Powell, and the completion of the Union Pacific railway, with particular account of the exploits of trappers and traders. G. P. Putnam's sons.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDellenbaugh, Frederick Samuel. Breaking the Wilderness: The Story of the Conquest of the Far West, from the Wanderings of Cabeza De Vaca, to the First Descent of the Colorado by Powell, and the Completion of the Union Pacific Railway, with Particular Account of the Exploits of Trappers and Traders. New York, London: G. P. Putnam's sons, 1905.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDellenbaugh, Frederick Samuel. Breaking the Wilderness: The Story of the Conquest of the Far West, from the Wanderings of Cabeza De Vaca, to the First Descent of the Colorado by Powell, and the Completion of the Union Pacific Railway, with Particular Account of the Exploits of Trappers and Traders. G. P. Putnam's sons, 1905.