APA-viite (7. p.)
Zill, D. G. (2018). A First Course in differential equations with modeling applications (11th ed.). Cengage Learning.
Chicago-viite (17. p.)
Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 11th ed. New Delhi: Cengage Learning, 2018.
MLA-viite (9. p.)
Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 11th ed. Cengage Learning, 2018.
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