APA (7th ed.) Citation

Isidore, o. S. Etymologiarum libri XX. Johann Mentelin.

Chicago Style (17th ed.) Citation

Isidore, of Seville. Etymologiarum Libri XX. Strassburg: Johann Mentelin.

MLA (8th ed.) Citation

Isidore, of Seville. Etymologiarum Libri XX. Johann Mentelin.