APA (7th ed.) Citation

Chellas, B. F. (1980). Modal logic: An introduction. Cambridge University Press.

Chicago Style (17th ed.) Citation

Chellas, Brian F. Modal Logic: An Introduction. Cambridge ; London ; New York ; New Rochelle ; Melbourne ; Sydney: Cambridge University Press, 1980.

MLA (9th ed.) Citation

Chellas, Brian F. Modal Logic: An Introduction. Cambridge University Press, 1980.