Hughes, G. E. (1996). A new introduction to modal logic. Routledge.
Chicago Style (17th ed.) CitationHughes, G. E. A New Introduction to Modal Logic. London: Routledge, 1996.
MLA (9th ed.) CitationHughes, G. E. A New Introduction to Modal Logic. Routledge, 1996.
Warning: These citations may not always be 100% accurate.