APA (7th ed.) Zitazioa

KELLS, L. M. (1960). Elementary differential equations. McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

KELLS, Lyman M. Elementary Differential Equations. New York: McGraw-Hill, 1960.

MLA (9th ed.) Zitazioa

KELLS, Lyman M. Elementary Differential Equations. McGraw-Hill, 1960.