Cite

Mendenhall's guide & road map of Pennsylvania, showing main touring routes & good roads, locations of towns, post offices, r.r. &c.

MLA

Mendenhall, C. S. Mendenhall's Guide & Road Map of Pennsylvania, Showing Main Touring Routes & Good Roads, Locations of Towns, Post Offices, R.r. &c. C.S. Mendenhall, 1909. https://collections.library.yale.edu/catalog/15827672.

APA, 6th edition

Mendenhall, C. S. (1909). Mendenhall's guide & road map of Pennsylvania, showing main touring routes & good roads, locations of towns, post offices, r.r. &c. [Maps]. C.S. Mendenhall, https://collections.library.yale.edu/catalog/15827672.