MLA

Valck, G. (Gerard), 1651 or 1652-1726. Aurelianensis Praefectura Generalis, in qua partiliter discriminati superiores Ducatus Cenomanensis ... [cartographic material] / Ger. et Leo. Valk.. [ca. 1702?]. https://collections.library.yale.edu/catalog/16618380.

APA, 6th edition

Valck, G. (Gerard), 1651 or 1652-1726. ([ca. 1702?])[Aurelianensis Praefectura Generalis, in qua partiliter discriminati superiores Ducatus Cenomanensis ... [cartographic material] / Ger. et Leo. Valk.]. https://collections.library.yale.edu/catalog/16618380.