APA (7th ed.) Citation

Armstrong, A. H. (1957). An introduction to ancient philosophy / by A.H. Armstrong (3rd ed.). Methuen.

Chicago Style (17th ed.) Citation

Armstrong, A. H. An Introduction to Ancient Philosophy / by A.H. Armstrong. 3rd ed. Methuen, 1957.

MLA (9th ed.) Citation

Armstrong, A. H. An Introduction to Ancient Philosophy / by A.H. Armstrong. 3rd ed. Methuen, 1957.

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