APA-viite (7. p.)

Zill, D. G. (2009). A First Course in Differential Equations: With modeling applications (9th ed.). Brooks/Cole.

Chicago-viite (17. p.)

Zill, Dennis G. A First Course in Differential Equations: With Modeling Applications. 9th ed. Pacific Grove: Brooks/Cole, 2009.

MLA-viite (9. p.)

Zill, Dennis G. A First Course in Differential Equations: With Modeling Applications. 9th ed. Brooks/Cole, 2009.