[Silver map of the world showing the track of Sir Francis Drakes circumnavigation engraved or struck on a flat silver disc by Michael Mercator]
MLA
Drake, Francis, Sir, 1540?-1596, Mercator, Michael. [Silver map of the world showing the track of Sir Francis Drakes circumnavigation engraved or struck on a flat silver disc by Michael Mercator]. [1589]. https://collections.library.yale.edu/catalog/2029988.
APA, 6th edition
Drake, Francis, Sir, 1540?-1596, & Mercator, Michael. ([1589])[[Silver map of the world showing the track of Sir Francis Drakes circumnavigation engraved or struck on a flat silver disc by Michael Mercator]]. https://collections.library.yale.edu/catalog/2029988.
