APA (7th ed.) Citation

Porfirio, c. 2. 3., Boecio, A. M. T. S., Libera, A. d., & Segonds, A. P. (1998). Isagoge. Vrin.

Chicago Style (17th ed.) Citation

Porfirio, ca. 234-ca. 305, Anicio Manlio Torcuato Severino Boecio, Alain de Libera, and A. Ph Segonds. Isagoge. Paris: Vrin, 1998.

MLA (9th ed.) Citation

Porfirio, ca. 234-ca. 305, et al. Isagoge. Vrin, 1998.