Opus paschale (fragment).
MLA
Sedulius, active 5th century. Opus paschale (fragment).. [between 1000 and 1050]. https://collections.library.yale.edu/catalog/2003597.
APA, 6th edition
Sedulius, active 5th century. ([between 1000 and 1050])[Opus paschale (fragment).]. https://collections.library.yale.edu/catalog/2003597.