MLA

Walton, Robert, 1618-1688. A new and accvrat map of the world : drawne according to ye truest descriptions latest discoveries & best observations y[e]t have beene made by English or strangers.. https://collections.library.yale.edu/catalog/16389944.

APA, 6th edition

Walton, Robert, 1618-1688. [A new and accvrat map of the world : drawne according to ye truest descriptions latest discoveries & best observations y[e]t have beene made by English or strangers.]. https://collections.library.yale.edu/catalog/16389944.