Cita APA (7th ed.)
Sneddon, I. N. (1957). Elements of partial differential equations. McGraw-Hill.
Cita Chicago (17th ed.)
Sneddon, Ian N. Elements of Partial Differential Equations. New Delhi: McGraw-Hill, 1957.
Cita MLA (9th ed.)
Sneddon, Ian N. Elements of Partial Differential Equations. McGraw-Hill, 1957.
Atenció: Aquestes cites poden no estar 100% correctes.