MLA

Pio, Giovanni Battista, d. 1540?. Ad reuerendissimum prothonortarium Antonium Galeatium Bentiuolum Ioannis Baptistæ Pii Bononiensis Prælectio in Titũ Lucretiũ & Suetoniū Trãquillũ.. Martiis [1501]. https://collections.library.yale.edu/catalog/17451989.

APA, 6th edition

Pio, Giovanni Battista, d. 1540?. (Martiis [1501])[Ad reuerendissimum prothonortarium Antonium Galeatium Bentiuolum Ioannis Baptistæ Pii Bononiensis Prælectio in Titũ Lucretiũ & Suetoniū Trãquillũ.]. https://collections.library.yale.edu/catalog/17451989.