Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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