MLA

Sperges, Joseph, Freiherr von, 1725-1791. Tyrolis pars meridionalis cum Espicopatu Tridentino finitimisque vallibus et limitibus Venetis. [ca. 1762?]. https://collections.library.yale.edu/catalog/2065601.

APA, 6th edition

Sperges, Joseph, Freiherr von, 1725-1791. ([ca. 1762?])[Tyrolis pars meridionalis cum Espicopatu Tridentino finitimisque vallibus et limitibus Venetis]. https://collections.library.yale.edu/catalog/2065601.