Collectiones (fragments).
MLA
Smaragdus, Abbot of St. Mihiel, active 809-819. Collectiones (fragments).. approximately 820-approximately 899.. https://collections.library.yale.edu/catalog/10543788.
APA, 6th edition
Smaragdus, Abbot of St. Mihiel, active 809-819. (approximately 820-approximately 899.)[Collectiones (fragments).]. https://collections.library.yale.edu/catalog/10543788.