MLA

Plotinus, et al. The Enneads. 2nd ed. / revised by B. S. Page. London: Faber & Faber, 1956.

APA

Plotinus, P., Dodds, E. Robertson, Henry, P., Mackenna, S., & Page, B. S. (1956). The Enneads. 2nd ed. / revised by B. S. Page. London: Faber & Faber.

Chicago

Plotinus, Eric Robertson Dodds, and Paul Henry. The Enneads. Translated by Stephen Mackenna. Edited by B. S Page. 2nd ed. / revised by B. S. Page. London: Faber & Faber, 1956.