Incipit ordo msisalis ... [xvi]-1 p
MLA
Incipit Ordo Msisalis ... [Xvi]-1 p. 1506. https://collections.library.yale.edu/catalog/2003523.
APA, 6th edition
Incipit ordo msisalis ... [xvi]-1 p. (1506). https://collections.library.yale.edu/catalog/2003523.