Morgan, D. L., & Ashley, W. H. (1964). The West of William H. Ashley: The international struggle for the fur trade of the Missouri, the Rocky Mountains, and the Columbia, with explorations beyond the Continental Divide, recorded in the diaries and letters of William H. Ashley and his contemporaries, 1822-1838. Old West Pub. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMorgan, Dale L., और William Henry Ashley. The West of William H. Ashley: The International Struggle for the Fur Trade of the Missouri, the Rocky Mountains, and the Columbia, with Explorations Beyond the Continental Divide, Recorded in the Diaries and Letters of William H. Ashley and His Contemporaries, 1822-1838. Denver: Old West Pub. Co., 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMorgan, Dale L., और William Henry Ashley. The West of William H. Ashley: The International Struggle for the Fur Trade of the Missouri, the Rocky Mountains, and the Columbia, with Explorations Beyond the Continental Divide, Recorded in the Diaries and Letters of William H. Ashley and His Contemporaries, 1822-1838. Old West Pub. Co., 1964.