APA-referens (7:e uppl.)
Zill, D. G. (2001). A first course in differential equations with modeling applications (7th ed.). Brooks/Cole/Thomson Learning.
Chicago-referens (17:e uppl.)
Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th ed. Pacific Grove, CA: Brooks/Cole/Thomson Learning, 2001.
MLA-referens (9:e uppl.)
Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th ed. Brooks/Cole/Thomson Learning, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.