MLA

Tzetzes, John, active 12th century. Scholia ad Hesiodum. [ca. 1550]. https://collections.library.yale.edu/catalog/17443093.

APA, 6th edition

Tzetzes, John, active 12th century. ([ca. 1550])[Scholia ad Hesiodum]. https://collections.library.yale.edu/catalog/17443093.