Du Plessis, N. (1986). Theory and Problems of Partial Differential Equations. McGraw-Hill.
Cita Chicago (17th ed.)Du Plessis, Nicolaas. Theory and Problems of Partial Differential Equations. New York: McGraw-Hill, 1986.
Cita MLA (9th ed.)Du Plessis, Nicolaas. Theory and Problems of Partial Differential Equations. McGraw-Hill, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.