MLA

Jefferys, Thomas, d. 1771. A map of the King of Great Britain's Dominions in Germany, or, The Electorate of Brunswick-Lunenburg with its dependencies [cartographic material] : containing the Dutchies of Lunenburg, Calenberg, Grunbenhagen, Lauenburg, Bremen & Verden, and the countie. [1759]. https://collections.library.yale.edu/catalog/10563642.

APA, 6th edition

Jefferys, Thomas, d. 1771. ([1759])[A map of the King of Great Britain's Dominions in Germany, or, The Electorate of Brunswick-Lunenburg with its dependencies [cartographic material] : containing the Dutchies of Lunenburg, Calenberg, Grunbenhagen, Lauenburg, Bremen & Verden, and the countie]. https://collections.library.yale.edu/catalog/10563642.