APA (7th ed.) Citation

Friis Johansen, K. (1991). A History of ancient philosophy: From the beginnings to. Routledge.

Chicago Style (17th ed.) Citation

Friis Johansen, Karsten. A History of Ancient Philosophy: From the Beginnings to. London: Routledge, 1991.

MLA (9th ed.) Citation

Friis Johansen, Karsten. A History of Ancient Philosophy: From the Beginnings to. Routledge, 1991.