Comfort, J. (1995). Effective presentations: Student's book. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoComfort, Jeremy. Effective Presentations: Student's Book. Oxford: Oxford University Press, 1995.
Dyfyniad MLAComfort, Jeremy. Effective Presentations: Student's Book. Oxford: Oxford University Press, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.