Periermenias Aristotelis ... [etc.].

MLA

Boethius, et al. Periermenias Aristotelis ... [etc.].

APA

Boethius, Apuleius., Ausonius, D., Phillipps, T., Beck, H., Saint-Benoît-sur-Loire (Abbey) & Lawrence J. Schoenberg Collection (University of Pennsylvania). (850). Periermenias Aristotelis ... [etc.].

Chicago

Boethius, Apuleius., Decimus Magnus. Ausonius, Thomas Phillipps, Helmut Beck, Saint-Benoît-sur-Loire (Abbey) and Lawrence J. Schoenberg Collection (University of Pennsylvania). Periermenias Aristotelis ... [etc.].