Nagle, R. K. (1993). Fundamentals of differential equations and boundary value problems. Addison-Wesley.
Dyfyniad Arddull ChicagoNagle, R. Kent. Fundamentals of Differential Equations and Boundary Value Problems. Reading, Massachusetts: Addison-Wesley, 1993.
Dyfyniad MLANagle, R. Kent. Fundamentals of Differential Equations and Boundary Value Problems. Addison-Wesley, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.