MLA

Faden, William, 1749-1836. A new map of the German Empire and the neighbouring states with their principal post roads : originally published by the Royal Academy of Berlin. June the 24th, 1788.. https://collections.library.yale.edu/catalog/2046615.

APA, 6th edition

Faden, William, 1749-1836. (June the 24th, 1788.)[A new map of the German Empire and the neighbouring states with their principal post roads : originally published by the Royal Academy of Berlin]. https://collections.library.yale.edu/catalog/2046615.