Cite

Isidore's Differentiae, etc. (fragment).

MLA

Isidore, of Seville, Saint, -636. Isidore's Differentiae, etc. (fragment).. [between 1100 and 1110].. https://collections.library.yale.edu/catalog/2003675.

APA, 6th edition

Isidore, of Seville, Saint, -636. ([between 1100 and 1110].)[Isidore's Differentiae, etc. (fragment).]. https://collections.library.yale.edu/catalog/2003675.