APA (7th ed.) Citation

Brown, J. R. (1997). What is theatre?: An introduction and exploration. Focal Press.

Chicago Style (17th ed.) Citation

Brown, John Russell. What Is Theatre?: An Introduction and Exploration. Boston: Focal Press, 1997.

MLA (8th ed.) Citation

Brown, John Russell. What Is Theatre?: An Introduction and Exploration. Focal Press, 1997.