Edwards, C. H., & Penney, D. E. (2000). Differential equations and boundary value problems (2nd ed.). Upper Saddle River, N.J.: Prentice Hall.
Παραπομπή Chicago StyleEdwards, C. H., and David E. Penney. Differential Equations and Boundary Value Problems. 2nd ed. Upper Saddle River, N.J.: Prentice Hall, 2000.
Παραπομπή MLAEdwards, C. H., and David E. Penney. Differential Equations and Boundary Value Problems. 2nd ed. Upper Saddle River, N.J.: Prentice Hall, 2000.
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