Zill, D. G. (2001). Differential Equations: With boundary-value problems (5th ed.). Brooks/Cole.
Citazione stile Chigago Style (17a edizione)Zill, Dennis G. Differential Equations: With Boundary-value Problems. 5th ed. Pacific Grove: Brooks/Cole, 2001.
Citatione MLA (9a ed.)Zill, Dennis G. Differential Equations: With Boundary-value Problems. 5th ed. Brooks/Cole, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.