Zill, D. G. (2001). A first course in differential equations with modeling applications (7th edition.). Brooks/Cole Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th edition. Pacific Grove, CA: Brooks/Cole Thomson Learning, 2001.
Lua MLA (8ú heag.)Zill, Dennis G. A First Course in Differential Equations with Modeling Applications. 7th edition. Brooks/Cole Thomson Learning, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.