Cite

Map of Ashland : as surveyed by E.M. Thurston.

MLA

Thurston, E. M. Map of Ashland : as Surveyed by E.M. Thurston. Th. Schrader?, 1857. https://collections.library.yale.edu/catalog/15814826.

APA, 6th edition

Thurston, E. M. (1857). Map of Ashland : as surveyed by E.M. Thurston. [Maps]. Th. Schrader?, https://collections.library.yale.edu/catalog/15814826.