RITGER, P. D. a. R. (1968). Differential equations with applications. McGraw-Hill.
Cita Chicago (17th ed.)RITGER, Paul D. and ROSE. Differential Equations with Applications. New York: McGraw-Hill, 1968.
Cita MLA (9th ed.)RITGER, Paul D. and ROSE. Differential Equations with Applications. McGraw-Hill, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.