Johnsonbaugh, R. (1984). Discrete mathematics. Macmillan Pub. Co. Collier Macmillan Publishers.
Dyfyniad Arddull ChicagoJohnsonbaugh, Richard. Discrete Mathematics. New York, London: Macmillan Pub. Co. Collier Macmillan Publishers, 1984.
Dyfyniad MLAJohnsonbaugh, Richard. Discrete Mathematics. Macmillan Pub. Co. Collier Macmillan Publishers, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.