APA (7th ed.) Citation

Armstrong, A. H. (1947). An introduction to ancient philsosophy. Methuen.

Chicago Style (17th ed.) Citation

Armstrong, A. H. An Introduction to Ancient Philsosophy. London: Methuen, 1947.

MLA (8th ed.) Citation

Armstrong, A. H. An Introduction to Ancient Philsosophy. Methuen, 1947.

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