MLA

Schenk, Peter, 1660-1718 or 1719. Regni Hungariae, Graeciae, Moreae, totius Danubii, adiacentiumque regnorum, nec non totius Graeciae et Archipelagi delineatio nova [cartographic material] / expressa a Petro Schenk.. ca. 1700?]. https://collections.library.yale.edu/catalog/16618393.

APA, 6th edition

Schenk, Peter, 1660-1718 or 1719. (ca. 1700?])[Regni Hungariae, Graeciae, Moreae, totius Danubii, adiacentiumque regnorum, nec non totius Graeciae et Archipelagi delineatio nova [cartographic material] / expressa a Petro Schenk.]. https://collections.library.yale.edu/catalog/16618393.