APA (7th ed.) Citation

Whittaker, H. (2001). The purpose of Porphyry's letter to Marcella.

Chicago Style (17th ed.) Citation

Whittaker, Helène. The Purpose of Porphyry's Letter to Marcella. 2001.

MLA (9th ed.) Citation

Whittaker, Helène. The Purpose of Porphyry's Letter to Marcella. 2001.

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