Gulick, Bill. A Traveler's History of Washington. Caldwell, Idaho: CaxtonPress. 1996: 164. ISBN 0-8700-4371-4. 维基共享资源上的相关多媒体资源:霍奎厄姆 (華盛頓州) 官方網站 (页面存档备份,存于互联网档案馆)
Oregon: Timber Press. ISBN 0-88192-899-2. OCLC 236142647. Gulick, Bill (2004). Steamboats on Northwest Rivers. Caldwell, Idaho: CaxtonPress. ISBN 0-87004-438-9
Glendo, Wyoming: High Plains Press. - ISBN 978-0-931271-58-8. p.36 Census 2000 U.S. Gazetteer Files: Counties. UnitedStates Census. [2011-02-13]. (原始内容存档于2012-06-06)