Edwards, C. H., & Penney, D. E. (2008). Elementary differential equations (Sixth edition.). Pearson/Prentice Hall.
Chicago-viite (17. p.)Edwards, C. H., ja David E. Penney. Elementary Differential Equations. Sixth edition. Upper Saddle River, N.J: Pearson/Prentice Hall, 2008.
MLA-viite (8. p.)Edwards, C. H., ja David E. Penney. Elementary Differential Equations. Sixth edition. Pearson/Prentice Hall, 2008.
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