MLA

Bolton, Clarke, and Pratt. Information Map of the City of Richmond and Guide to Points of Interest / Compiled and Published by Bolton, Clarke & Pratt. Bolton, Clarke & Pratt, 0AD. https://collections.library.yale.edu/catalog/15827550.

APA, 6th edition

Bolton, C., & P. (0 C.E.). Information map of the city of Richmond and guide to points of interest / compiled and published by Bolton, Clarke & Pratt. [Maps]. Bolton, Clarke & Pratt, https://collections.library.yale.edu/catalog/15827550.