Petrovsky, I. G., & Shenitzer, A. (1991). Lectures on partial differential equations. New York: Dover Publications, Inc..
استشهاد بنمط شيكاغوPetrovsky, I. G., و Abe Shenitzer. Lectures On Partial Differential Equations. New York: Dover Publications, Inc., 1991.
MLA استشهادPetrovsky, I. G., و Abe Shenitzer. Lectures On Partial Differential Equations. New York: Dover Publications, Inc., 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.