MLA

Plummer, Frederick G. Traver's Map of Tacoma and Environs, Washington / Compiled by Frederick G. Plummer, Civil Engineer, Tacoma. G.W. Traver?],, L.H. Everts, Lith.), 1891. https://collections.library.yale.edu/catalog/15821674.

APA, 6th edition

Plummer, F. G. (1891). Traver's map of Tacoma and environs, Washington / compiled by Frederick G. Plummer, civil engineer, Tacoma. [Maps]. G.W. Traver?],, L.H. Everts, Lith.). https://collections.library.yale.edu/catalog/15821674.