APA (7th ed.) Citation

Armstrong, A. (1957). An introduction to ancient philosophy (3. ed.). Methuen Co..

Chicago Style (17th ed.) Citation

Armstrong, A.H. An Introduction to Ancient Philosophy. 3. ed. London: Methuen Co., 1957.

MLA (9th ed.) Citation

Armstrong, A.H. An Introduction to Ancient Philosophy. 3. ed. Methuen Co., 1957.

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