Portolan chart of the Mediterranean Sea, the North Atlantic Ocean, the Black Sea, and the northwestern African coast.
MLA
Becharius, Franciscus. Portolan Chart of the Mediterranean Sea, the North Atlantic Ocean, the Black Sea, and the Northwestern African Coast. 0AD. https://collections.library.yale.edu/catalog/2005106.
APA, 6th edition
Becharius, F. (0 C.E.). Portolan chart of the Mediterranean Sea, the North Atlantic Ocean, the Black Sea, and the northwestern African coast. [Manuscript maps., Manuscript waste (Binding), Portolan charts.]. https://collections.library.yale.edu/catalog/2005106.