Παραπομπή APA

Sneddon, I. N. (1957). Elements of partial differential equations. McGraw-Hill.

Παραπομπή Chicago Style

Sneddon, Ian N. Elements of Partial Differential Equations. New York: McGraw-Hill, 1957.

Παραπομπή MLA

Sneddon, Ian N. Elements of Partial Differential Equations. McGraw-Hill, 1957.