Citazione APA

Hughes, G. E., & Cresswell, M. J. (1996). A new introduction to modal logic. London ; New York.

Stile di citazione Chicago

Hughes, G. E., e M. J. Cresswell. A New Introduction to Modal Logic. London ; New York, 1996.

Citazione MLA

Hughes, G. E., e M. J. Cresswell. A New Introduction to Modal Logic. London ; New York, 1996.