Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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