APA (7th ed.) Citation

Lewis, D. K. (1986). On the plurality of worlds. B. Blackwell.

Chicago Style (17th ed.) Citation

Lewis, David K. On the Plurality of Worlds. Oxford, UK ; New York, NY, USA: B. Blackwell, 1986.

MLA (9th ed.) Citation

Lewis, David K. On the Plurality of Worlds. B. Blackwell, 1986.