MLA

Four Gospels. 1307. https://collections.library.yale.edu/catalog/16362879.

APA, 6th edition

Four Gospels. (1307). [Canon tables, Gospels, Manuscripts, Armenian 14th century, Manuscripts, Medieval Armenia 14th century, Armenian manuscripts, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16362879.