APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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