APA (7th ed.) Citation

Porphyrius 233-301 & Warren, E. W. (1975). Isagoge. Mediaeval sources in translation.

Chicago Style (17th ed.) Citation

Porphyrius 233-301 and Edward W. Warren. "Isagoge." Mediaeval Sources in Translation 1975.

MLA (8th ed.) Citation

Porphyrius 233-301 and Edward W. Warren. "Isagoge." Mediaeval Sources in Translation, 1975.

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