Cita APA (7a ed.)

Kells, L. M. (1965). Elementary differential equations (6th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Kells, Lyman M. Elementary Differential Equations. 6th ed. New York: McGraw-Hill, 1965.

Cita MLA (8a ed.)

Kells, Lyman M. Elementary Differential Equations. 6th ed. McGraw-Hill, 1965.