MLA

Seutter, Matthaeus, 1678-1756. Electoratus sive Marchia Brandenburgensis : juxta novissimam delineationem in mappa geographica / accuratae aeri incisa opera et sumptibus Matthaei Seutteri S. Caes. et Reg. Cath., maj. geogr.. [1740?]. https://collections.library.yale.edu/catalog/16670951.

APA, 6th edition

Seutter, Matthaeus, 1678-1756. ([1740?])[Electoratus sive Marchia Brandenburgensis : juxta novissimam delineationem in mappa geographica / accuratae aeri incisa opera et sumptibus Matthaei Seutteri S. Caes. et Reg. Cath., maj. geogr.]. https://collections.library.yale.edu/catalog/16670951.