Oregon Treaty from Wikisource. Accessed 12 February 2015.
worldcat.org
Mackie 1997，第29, 124–126, 140頁. Mackie, Richard Somerset, Trading Beyond the Mountains: The British Fur Trade on the Pacific 1793–1843, Vancouver [B.C.]: UBC Press, 1997, ISBN 978-0-7748-0559-9, OCLC 180704193
