Cita APA (7th ed.)

Zill, D. G., & Cullen, M. R. (2009). Differential equations with boundary-value problems (Seventh edition.). Brooks/Cole, Cengage Learning.

Cita Chicago (17th ed.)

Zill, Dennis G., i Michael R. Cullen. Differential Equations with Boundary-value Problems. Seventh edition. Belmont, CA: Brooks/Cole, Cengage Learning, 2009.

Cita MLA (9th ed.)

Zill, Dennis G., i Michael R. Cullen. Differential Equations with Boundary-value Problems. Seventh edition. Brooks/Cole, Cengage Learning, 2009.