Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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