Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.