MLA

Keulen, Gerard van, and cartographer. De Kust Van Pomeren, Hey Eyland Rugen [Cartographic Material]. By Gerard van Keulen ..., 0AD. https://collections.library.yale.edu/catalog/16618337.

APA, 6th edition

Keulen, G. van, & cartographer. (0 C.E.). De kust van Pomeren, hey eyland Rugen [cartographic material]. [Maps, Early works to 1800, Nautical charts]. By Gerard van Keulen ... https://collections.library.yale.edu/catalog/16618337.