MLA

Scull, Nicholas, 1686?-1761?. To the honourable Thomas Penn and Richard Penn...this map of the improved part of the province of Pennsylvania is humbly dedicated / by Nicholas Scull ; engraved by Ja. Turner.. BRBL_00497. 1759. https://collections.library.yale.edu/catalog/15790120.

APA, 6th edition

Scull, Nicholas, 1686?-1761?. (["BRBL_00497"])(1759)[To the honourable Thomas Penn and Richard Penn...this map of the improved part of the province of Pennsylvania is humbly dedicated / by Nicholas Scull ; engraved by Ja. Turner.]. https://collections.library.yale.edu/catalog/15790120.