Παραπομπή APA

Nand, B., & Sharma, B. D. (1972). Spherical harmonics and partial differential equations (5th ed.). Kedar Nath Ram Nath publishers.

Παραπομπή Chicago Style

Nand, Brahma, και Bhu Dev Sharma. Spherical Harmonics and Partial Differential Equations. 5th ed. Meerut: Kedar Nath Ram Nath publishers, 1972.

Παραπομπή MLA

Nand, Brahma, και Bhu Dev Sharma. Spherical Harmonics and Partial Differential Equations. 5th ed. Kedar Nath Ram Nath publishers, 1972.