Citazione Stile APA (7a Edizione)
Zill, D. G., & Cullen, M. R. (1997). Differential equations with boundary-value problems (4th ed.). Brooks/Cole Pub. Co..
Citazione stile Chigago Style (17a edizione)
Zill, Dennis G., e Michael R. Cullen. Differential Equations with Boundary-value Problems. 4th ed. Pacific Grove: Brooks/Cole Pub. Co., 1997.
Citatione MLA (9a ed.)
Zill, Dennis G., e Michael R. Cullen. Differential Equations with Boundary-value Problems. 4th ed. Brooks/Cole Pub. Co., 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.