United States. Post Office Department. (1928). Post route map of the state of Washington: Showing post offices with the intermediate distances on mail routes in operation on the 1st of January 1928. Published by order of Postmaster General Harry S. New.
Cita Chicago Style (17a ed.)United States. Post Office Department. Post Route Map of the State of Washington: Showing Post Offices with the Intermediate Distances on Mail Routes in Operation on the 1st of January 1928. [Washington, D.C.]: Published by order of Postmaster General Harry S. New, 1928.
Cita MLA (8a ed.)United States. Post Office Department. Post Route Map of the State of Washington: Showing Post Offices with the Intermediate Distances on Mail Routes in Operation on the 1st of January 1928. Published by order of Postmaster General Harry S. New, 1928.