APA (7th ed.) Citation

Westphal, J., & Wittgenstein, L. (1987). Colour: Some philosophical problems from Wittgenstein. B. Blackwell.

Chicago Style (17th ed.) Citation

Westphal, Jonathan, and Ludwig Wittgenstein. Colour: Some Philosophical Problems from Wittgenstein. Oxford, OX, UK ; New York, NY, USA: B. Blackwell, 1987.

MLA (9th ed.) Citation

Westphal, Jonathan, and Ludwig Wittgenstein. Colour: Some Philosophical Problems from Wittgenstein. B. Blackwell, 1987.