Cita APA

Hughes, G. E., & Cresswell, M. J. (1984). A companion to modal logic. Methuen.

Citación estilo Chicago

Hughes, G. E., y M. J. Cresswell. A Companion to Modal Logic. London ; New York: Methuen, 1984.

Cita MLA

Hughes, G. E., y M. J. Cresswell. A Companion to Modal Logic. Methuen, 1984.