Chcurchill, R. V. (1958). Operational mathematics (2d ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoChcurchill, Ruel Vance. Operational Mathematics. 2d ed. New York: McGraw-Hill, 1958.
Dyfyniad MLAChcurchill, Ruel Vance. Operational Mathematics. 2d ed. McGraw-Hill, 1958.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.