APA (7th ed.) Citation

Porphyrius 233-301, Marg, W., & Harder, R. (1958). Plotins Schriften. Plotins Schriften.

Chicago Style (17th ed.) Citation

Porphyrius 233-301, Walter Marg, and Richard Harder. "Plotins Schriften." Plotins Schriften 1958.

MLA (9th ed.) Citation

Porphyrius 233-301, et al. "Plotins Schriften." Plotins Schriften, 1958.

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