APA (7th ed.) Citation

Hughes, G. E., & Cresswell, M. J. (1996). A new introduction to modal logic / G.E. Hughes and M.J. Cresswell. Routledge.

Chicago Style (17th ed.) Citation

Hughes, G. E., and M. J. Cresswell. A New Introduction to Modal Logic / G.E. Hughes and M.J. Cresswell. London ; New York: Routledge, 1996.

MLA (9th ed.) Citation

Hughes, G. E., and M. J. Cresswell. A New Introduction to Modal Logic / G.E. Hughes and M.J. Cresswell. Routledge, 1996.

Warning: These citations may not always be 100% accurate.