Boyce, W. E., & DiPrima, R. C. (1977). Elementary differential equations and boundary value problems (4th ed.). Wiley.
Dyfyniad Arddull ChicagoBoyce, William E., and Richard C. DiPrima. Elementary Differential Equations and Boundary Value Problems. 4th ed. New York: Wiley, 1977.
Dyfyniad MLABoyce, William E., and Richard C. DiPrima. Elementary Differential Equations and Boundary Value Problems. 4th ed. Wiley, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.