APA-referens (7:e uppl.)

Edwards, C. H., & Penney, D. E. (2008). Elementary differential equations (Sixth edition.). Pearson/Prentice Hall.

Chicago-referens (17:e uppl.)

Edwards, C. H., och David E. Penney. Elementary Differential Equations. Sixth edition. Upper Saddle River, N.J: Pearson/Prentice Hall, 2008.

MLA-referens (8:e uppl.)

Edwards, C. H., och David E. Penney. Elementary Differential Equations. Sixth edition. Pearson/Prentice Hall, 2008.