Cite

Map of Huntingdon County ... by John Morrison.

MLA

Map of Huntingdon County ... by John Morrison. John Melish & Sam Harrison, 1818. https://collections.library.yale.edu/catalog/15811111.

APA, 6th edition

Map of Huntingdon County ... by John Morrison. (1818). [Maps]. John Melish & Sam Harrison, https://collections.library.yale.edu/catalog/15811111.