APA (7e ed.) Bronvermelding

Zill, D. G. (2018). Differential equations with boundary-value problems (9E.). Cengage Learning.

Chicago (17e ed.) Bronvermelding

Zill, Dennis G. Differential Equations with Boundary-value Problems. 9E. Boston, MA: Cengage Learning, 2018.

MLA (9e ed.) Bronvermelding

Zill, Dennis G. Differential Equations with Boundary-value Problems. 9E. Cengage Learning, 2018.