APA (7th ed.) Citation

Zill, D. G., & Cullen, M. R. (1992). Differential equations with boundary-value problems (3rd ed.). PWS-KENT.

Chicago Style (17th ed.) Citation

Zill, Dennis G., and Michael R. Cullen. Differential Equations with Boundary-value Problems. 3rd ed. Boston: PWS-KENT, 1992.

MLA (9th ed.) Citation

Zill, Dennis G., and Michael R. Cullen. Differential Equations with Boundary-value Problems. 3rd ed. PWS-KENT, 1992.