Douglas, D., Wilks, W., & Hutchinson, H. R. (1914). Journal kept by David Douglas during his travels in North America, 1823-1827: Together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834. W. Wesley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDouglas, David, W. Wilks, और H. R. Hutchinson. Journal Kept by David Douglas During His Travels in North America, 1823-1827: Together with a Particular Description of Thirty-three Species of American Oaks and Eighteen Species of Pinus, with Appendices Containing a List of the Plants Introduced by Douglas and an Account of His Death in 1834. London: W. Wesley, 1914.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDouglas, David, et al. Journal Kept by David Douglas During His Travels in North America, 1823-1827: Together with a Particular Description of Thirty-three Species of American Oaks and Eighteen Species of Pinus, with Appendices Containing a List of the Plants Introduced by Douglas and an Account of His Death in 1834. W. Wesley, 1914.