MLA

Cary, John, ca. 1754-1835. A new map of the kingdom of Portugal, divided into its provinces : from the latest authorities / by John Cary, engraver, 1811.. BRBL_00195. Apr. 21, 1811.. https://collections.library.yale.edu/catalog/15487363.

APA, 6th edition

Cary, John, ca. 1754-1835. (["BRBL_00195"])(Apr. 21, 1811.)[A new map of the kingdom of Portugal, divided into its provinces : from the latest authorities / by John Cary, engraver, 1811.]. https://collections.library.yale.edu/catalog/15487363.