Cita APA (7a ed.)

Zill, D. G. (1989). A first course in differential equations with applications (Fourth edition.). PWS-Kent.

Cita Chicago Style (17a ed.)

Zill, Dennis G. A First Course in Differential Equations with Applications. Fourth edition. Boston: PWS-Kent, 1989.

Cita MLA (8a ed.)

Zill, Dennis G. A First Course in Differential Equations with Applications. Fourth edition. PWS-Kent, 1989.