MLA

Anville, Jean Baptiste Bourguignon d', 1697-1782, Boulton, S., creator, Sayer, Robert, 1725-1794. Africa : with all its states, kingdoms, republics, regions, islands, & ca., improved and inlarged from D'Anville's map : to which have been added a particular chart of the Gold Coast wherein are distinguished all the European forts and factories. 1787 January 6. https://collections.library.yale.edu/catalog/2046626.

APA, 6th edition

Anville, Jean Baptiste Bourguignon d', 1697-1782, & Boulton, S., creator, & Sayer, Robert, 1725-1794. (1787 January 6)[Africa : with all its states, kingdoms, republics, regions, islands, & ca., improved and inlarged from D'Anville's map : to which have been added a particular chart of the Gold Coast wherein are distinguished all the European forts and factories]. https://collections.library.yale.edu/catalog/2046626.