Cassianus, Stephanus de. 1 letter; Aretium (Arezzo). 2pp.
MLA
Cassianus, Stephanus De. 1 Letter; Aretium (Arezzo). 2pp. 1471. https://collections.library.yale.edu/catalog/2065198.
APA, 6th edition
Cassianus, Stephanus de. 1 letter; Aretium (Arezzo). 2pp. (1471). https://collections.library.yale.edu/catalog/2065198.