MLA

Seller, John, fl. 1658-1698. A sea chart of the Gulph of Venice : describing all the sea coasts and islands contained therein.. 1677]. https://collections.library.yale.edu/catalog/15493288.

APA, 6th edition

Seller, John, fl. 1658-1698. (1677])[A sea chart of the Gulph of Venice : describing all the sea coasts and islands contained therein.]. https://collections.library.yale.edu/catalog/15493288.