MLA

Sperges, Joseph, Freiherr von, 1725-1791. Tyrolis pars meridionalis cum Espicopatu Tridentino finitimisque vallibus et limitibus Venetis / accurate descripta a Iosepho de Spergs in Palenz et Reisdorf.. BRBL_00234. [ca. 1762?]. https://collections.library.yale.edu/catalog/15763337.

APA, 6th edition

Sperges, Joseph, Freiherr von, 1725-1791. (["BRBL_00234"])([ca. 1762?])[Tyrolis pars meridionalis cum Espicopatu Tridentino finitimisque vallibus et limitibus Venetis / accurate descripta a Iosepho de Spergs in Palenz et Reisdorf.]. https://collections.library.yale.edu/catalog/15763337.