MLA

Gospel Lectionary. 0AD. https://collections.library.yale.edu/catalog/10621988.

APA, 6th edition

Gospel Lectionary. (0 C.E.). [Manuscripts, Medieval Switzerland 12th century, Manuscripts, Medieval Switzerland 11th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10621988.