Cite

Map of Worcester County, Mass. / published by Geo. H. Walker & Co.

MLA

Walker, Geo. H., and Co. Map of Worcester County, Mass. / Published by Geo. H. Walker & Co. Geo. H. Walker & Co., 0AD. https://collections.library.yale.edu/catalog/15827567.

APA, 6th edition

Walker, G. H., & C. (0 C.E.). Map of Worcester County, Mass. / published by Geo. H. Walker & Co. [Maps]. Geo. H. Walker & Co., https://collections.library.yale.edu/catalog/15827567.