MLA

Homann, Johann Baptist, 1663-1724. Archiepiscopatus et Electoratus Coloniensis ut et Ducatuum Juliacensis et Montensis nec non comitatus Meursiae nova tabula / excudente Iohan Baptista Homanno.. [approximately 1715]. https://collections.library.yale.edu/catalog/16670964.

APA, 6th edition

Homann, Johann Baptist, 1663-1724. ([approximately 1715])[Archiepiscopatus et Electoratus Coloniensis ut et Ducatuum Juliacensis et Montensis nec non comitatus Meursiae nova tabula / excudente Iohan Baptista Homanno.]. https://collections.library.yale.edu/catalog/16670964.