APA (7th ed.) Citation

Armstrong, D. M. (1961). Perception and the physical world. Routledge & Paul.

Chicago Style (17th ed.) Citation

Armstrong, David Malet. Perception and the Physical World. London: Routledge & Paul, 1961.

MLA (9th ed.) Citation

Armstrong, David Malet. Perception and the Physical World. Routledge & Paul, 1961.