APA استشهاد

Haack, W. (1972). Lectures on partial differential equations. Pergamon press.

استشهاد بنمط شيكاغو

Haack, Wolfgang. Lectures on Partial Differential Equations. Oxford: Pergamon press, 1972.

MLA استشهاد

Haack, Wolfgang. Lectures on Partial Differential Equations. Pergamon press, 1972.