APA استشهاد

Churchill, R. V. (1963). Fourier series and boundary value problems (23.).

استشهاد بنمط شيكاغو

Churchill, Ruel V. Fourier Series and Boundary Value Problems. 23. McGraw-Hill Book Co., New York, 1963.

MLA استشهاد

Churchill, Ruel V. Fourier Series and Boundary Value Problems. 23. 1963.