MLA

Osório, Jerónimo, 1506-1580. Della nobilta civile. [ca. 1600]. https://collections.library.yale.edu/catalog/11684579.

APA, 6th edition

Osório, Jerónimo, 1506-1580. ([ca. 1600])[Della nobilta civile]. https://collections.library.yale.edu/catalog/11684579.