Zill, D. G., Wright, W. S., & Cullen, . M. R. (2013). Differential equations with boundary-value problems (Eight edition.). Brooks/Cole Cengage Learning.
Chicago-referens (17:e uppl.)Zill, Dennis G., Warren S. Wright, och Michael R. Cullen. Differential Equations with Boundary-value Problems. Eight edition. Australia: Brooks/Cole Cengage Learning, 2013.
MLA-referens (8:e uppl.)Zill, Dennis G., et al. Differential Equations with Boundary-value Problems. Eight edition. Brooks/Cole Cengage Learning, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.