APA استشهاد

Sneddon, I. N. Elements of partial differential equations. Mc Graw Hill.

استشهاد بنمط شيكاغو

Sneddon, Ian N. Elements of Partial Differential Equations. N. Delhi: Mc Graw Hill.

MLA استشهاد

Sneddon, Ian N. Elements of Partial Differential Equations. Mc Graw Hill.