MLA

Wyld, James, 1812-1887. Map of the Germanic confederated states : including the kingdoms of Prussia, and the empire of Germany / James Wyld.. BRBL_00120. [1875?]. https://collections.library.yale.edu/catalog/15476413.

APA, 6th edition

Wyld, James, 1812-1887. (["BRBL_00120"])([1875?])[Map of the Germanic confederated states : including the kingdoms of Prussia, and the empire of Germany / James Wyld.]. https://collections.library.yale.edu/catalog/15476413.