MLA

Washington at Statehood 1889-1989 : a Map Celebrating 100 Years of Progress and Statehood / Cartographers: Eric Phillips ... [Et Al.]. Washington State Archives and Records Management Division, , 1989. https://collections.library.yale.edu/catalog/15821708.

APA, 6th edition

Washington at statehood 1889-1989 : a map celebrating 100 years of progress and statehood / cartographers: Eric Phillips ... [et al.]. (1989). [Maps]. Washington State Archives and Records Management Division, . https://collections.library.yale.edu/catalog/15821708.