Cite
MLA
Von Haake, A., and United States. Post Office Dept. Post route map of the territory of Alaska showing post offices and the intermediate distances on mail routes in operation on the 1st of December, 1903. Washington, D.C.: Post Office Dept., 1903. Web. 17 Jan 2021. <https://ark.digitalcommonwealth.org/ark:/50959/cj82km41g>.
APA
Von Haake, A., & United States. Post Office Dept. (1903). Post route map of the territory of Alaska showing post offices and the intermediate distances on mail routes in operation on the 1st of December, 1903 [Map]. Retrieved from https://ark.digitalcommonwealth.org/ark:/50959/cj82km41g
Chicago
Von Haake, A., and United States. Post Office Dept. "Post route map of the territory of Alaska showing post offices and the intermediate distances on mail routes in operation on the 1st of December, 1903." Map. Washington, D.C.: Post Office Dept., 1903. Digital Commonwealth, https://ark.digitalcommonwealth.org/ark:/50959/cj82km41g (accessed January 17, 2021).