MLA

Senex, John, d. 1740. A new map of Africa, from the latest observations.. BRBL_00322. 1721]. https://collections.library.yale.edu/catalog/15512952.

APA, 6th edition

Senex, John, d. 1740. (["BRBL_00322"])(1721])[A new map of Africa, from the latest observations.]. https://collections.library.yale.edu/catalog/15512952.