APA (7th ed.) Citation

Plotinus, Armstrong, A. H., Henry, P., & Schwyzer, H. (1966). Plotinus. Harvard University Press.

Chicago Style (17th ed.) Citation

Plotinus, A. H. Armstrong, Paul Henry, and Hans-Rudolf Schwyzer. Plotinus. Cambridge, Mass: Harvard University Press, 1966.

MLA (9th ed.) Citation

Plotinus, et al. Plotinus. Harvard University Press, 1966.