Bird's eye view of Philadelphia. From sketches by Theodore R. Davis. Drawn and engraved expressly for Harper's weekly.
MLA
Davis, Theodore R. Bird's Eye View of Philadelphia. From Sketches by Theodore R. Davis. Drawn and Engraved Expressly for Harper's Weekly. Harper & Bros., 1872. https://collections.library.yale.edu/catalog/15811132.
APA, 6th edition
Davis, T. R. (1872). Bird's eye view of Philadelphia. From sketches by Theodore R. Davis. Drawn and engraved expressly for Harper's weekly. [Maps]. Harper & Bros., https://collections.library.yale.edu/catalog/15811132.