Cite

Preliminary map of Camp Meade Middletown, PA, Office of Chief Engineer 2nd Army Corps.

MLA

Preliminary Map of Camp Meade Middletown, PA, Office of Chief Engineer 2nd Army Corps. Norris Peters Co. Photo-litho, 1898. https://collections.library.yale.edu/catalog/15832249.

APA, 6th edition

Preliminary map of Camp Meade Middletown, PA, Office of Chief Engineer 2nd Army Corps. (1898). [Maps]. Norris Peters Co. Photo-litho, https://collections.library.yale.edu/catalog/15832249.