Yule, Henry. The River of Golden Sand: The Narrative of a Journey Through China and Eastern Tibet to Burmah, Vol. 1, p. 35 11 Mayıs 2016 tarihinde Wayback Machine sitesinde arşivlendi.. "Introductory Essay." 1880. Reprint: Cambridge University Press, 2010. Retrieved August 14, 2013.
Yule, Henry. The River of Golden Sand: The Narrative of a Journey Through China and Eastern Tibet to Burmah, Vol. 1, p. 35 11 Mayıs 2016 tarihinde Wayback Machine sitesinde arşivlendi.. "Introductory Essay." 1880. Reprint: Cambridge University Press, 2010. Retrieved August 14, 2013.