APA (7th ed.) Citation

Popkorn, S. (1994). First steps in modal logic. Cambridge University Press. https://doi.org/10.1017/CBO9780511983382

Chicago Style (17th ed.) Citation

Popkorn, Sally. First Steps in Modal Logic. Cambridge: Cambridge University Press, 1994. https://doi.org/10.1017/CBO9780511983382.

MLA (9th ed.) Citation

Popkorn, Sally. First Steps in Modal Logic. Cambridge University Press, 1994. https://doi.org/10.1017/CBO9780511983382.