Ford, L. R. (1933). Differential equations. McGraw-Hill.
Cita Chicago (17th ed.)Ford, Lester R. Differential Equations. New York: McGraw-Hill, 1933.
Cita MLA (8th ed.)Ford, Lester R. Differential Equations. McGraw-Hill, 1933.
Atenció: Aquestes cites poden no estar 100% correctes.