APA (7th ed.) Citation

Chellas, B. F. (1995). Modal logic: An introduction (Repr.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Chellas, Brian F. Modal Logic: An Introduction. Repr. Cambridge, Mass. [u.a.]: Cambridge Univ. Press, 1995.

MLA (9th ed.) Citation

Chellas, Brian F. Modal Logic: An Introduction. Repr. Cambridge Univ. Press, 1995.