Edwards, C. H., & Penney, D. E. (1989). Elementary differential equations with boundary value problems (2nd ed.). Prentice Hall.
Chicago Style (17th ed.) CitationEdwards, Charles Henry, and David E. Penney. Elementary Differential Equations with Boundary Value Problems. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1989.
MLA (9th ed.) CitationEdwards, Charles Henry, and David E. Penney. Elementary Differential Equations with Boundary Value Problems. 2nd ed. Prentice Hall, 1989.
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