APA (7th ed.) Citation

Boethius. In Porphyrii Isagogen commentorum editio prima. Brepols Publishers.

Chicago Style (17th ed.) Citation

Boethius. In Porphyrii Isagogen Commentorum Editio Prima. Turnhout: Brepols Publishers.

MLA (9th ed.) Citation

Boethius. In Porphyrii Isagogen Commentorum Editio Prima. Brepols Publishers.

Warning: These citations may not always be 100% accurate.