MLA

Leach, John, and Captain. A Map of the River Gambra from Eropina to Barrakunda / by Captn. John Leach in 1732 ; Thos. Kitchin Sculpt. [publisher not identified], 0AD. https://collections.library.yale.edu/catalog/16709974.

APA, 6th edition

Leach, J., & C. (0 C.E.). A map of the River Gambra from Eropina to Barrakunda / by Captn. John Leach in 1732 ; Thos. Kitchin sculpt. [Maps]. [publisher not identified], https://collections.library.yale.edu/catalog/16709974.