APA (7th ed.) Citation

Armstrong, H. (1965). An introduction to ancient philosophy (4.ed.). Methuen.

Chicago Style (17th ed.) Citation

Armstrong, Hilary. An Introduction to Ancient Philosophy. 4.ed. London: Methuen, 1965.

MLA (9th ed.) Citation

Armstrong, Hilary. An Introduction to Ancient Philosophy. 4.ed. Methuen, 1965.

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