Cita APA (7th ed.)

Zill, D. G., & Ross, S. L. (1986). Differential Equations: With boundary-value problems (3rd ed.). PWS-Kent Pub. Co..

Cita Chicago (17th ed.)

Zill, Dennis G., i Shepley L. Ross. Differential Equations: With Boundary-value Problems. 3rd ed. Boston: PWS-Kent Pub. Co., 1986.

Cita MLA (9th ed.)

Zill, Dennis G., i Shepley L. Ross. Differential Equations: With Boundary-value Problems. 3rd ed. PWS-Kent Pub. Co., 1986.