MLA

Robert de Vaugondy, Didier, 1723-1786. Britannicae Insulae in quibus Albion seu Britannia Major, et Iuernia seu Britannia Minor : juxta Ptolemaei mentem divisae, tùm in suas majores partes, tùm in populos exhibenturc / à Nicolao Sanson, Christ. Regis Geographo ; revisae, et ad observationes as. BRBL_00041. [1757?]. https://collections.library.yale.edu/catalog/15259718.

APA, 6th edition

Robert de Vaugondy, Didier, 1723-1786. (["BRBL_00041"])([1757?])[Britannicae Insulae in quibus Albion seu Britannia Major, et Iuernia seu Britannia Minor : juxta Ptolemaei mentem divisae, tùm in suas majores partes, tùm in populos exhibenturc / à Nicolao Sanson, Christ. Regis Geographo ; revisae, et ad observationes as]. https://collections.library.yale.edu/catalog/15259718.