APA (7th ed.) Zitazioa

Kells, L. M. (1954). Elementary differential equations (4a. ed.). McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Kells, Lyman Morse. Elementary Differential Equations. 4a. ed. Nueva York: McGraw-Hill, 1954.

MLA (9th ed.) Zitazioa

Kells, Lyman Morse. Elementary Differential Equations. 4a. ed. McGraw-Hill, 1954.