Cite

A new map of the Kingdoms of Spain and Portugal ...

MLA

A New Map of the Kingdoms of Spain and Portugal ... Robt. Sayer, 1790. https://collections.library.yale.edu/catalog/15487239.

APA, 6th edition

A new map of the Kingdoms of Spain and Portugal ... (1790). [Maps]. Robt. Sayer, https://collections.library.yale.edu/catalog/15487239.