Cite

Gould's official map of the city of St. Louis, Mo.

MLA

Gould's Official Map of the City of St. Louis, Mo. [Gould Directory Company, 1876. https://collections.library.yale.edu/catalog/15814660.

APA, 6th edition

Gould's official map of the city of St. Louis, Mo. (1876). [Maps]. [Gould Directory Company, https://collections.library.yale.edu/catalog/15814660.