Kells, L. M. (1954). Elementary Differential Equations. New York: McGraw-Hill.
Chicago Style CitationKells, Lyman M. Elementary Differential Equations. New York: McGraw-Hill, 1954.
Cita MLAKells, Lyman M. Elementary Differential Equations. New York: McGraw-Hill, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.