APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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