Edwards, C. H., & Penney, D. E. Elementary differential equations with boundary value problems / by C. Henry Edwards and David E. Penney ; with the assistance of David Calvis (6th ed.). Upper Saddle River, New Jersey : Pearson/Prentice Hall, 2009.
Chicago Style CitationEdwards, C. Henry, and David E. Penney. Elementary Differential Equations With Boundary Value Problems / By C. Henry Edwards and David E. Penney ; With the Assistance of David Calvis. 6th ed. Upper Saddle River, New Jersey : Pearson/Prentice Hall, 2009.
MLA CitationEdwards, C. Henry, and David E. Penney. Elementary Differential Equations With Boundary Value Problems / By C. Henry Edwards and David E. Penney ; With the Assistance of David Calvis. 6th ed. Upper Saddle River, New Jersey : Pearson/Prentice Hall, 2009.