Kevorkian, J., & Cole, J. (1981). Petrolium methods in applied mathematics. Springer-Verlag.
Dyfyniad Arddull ChicagoKevorkian, J., and J.D Cole. Petrolium Methods in Applied Mathematics. New York: Springer-Verlag, 1981.
Dyfyniad MLAKevorkian, J., and J.D Cole. Petrolium Methods in Applied Mathematics. Springer-Verlag, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.