Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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