APA (7th ed.) Citation

Hille, E. (1918). Some problems concerning spherical harmonics. Almqvist & Wiksells Boktryckeri.

Chicago Style (17th ed.) Citation

Hille, Einar. Some Problems Concerning Spherical Harmonics. Stockholm: Almqvist & Wiksells Boktryckeri, 1918.

MLA (8th ed.) Citation

Hille, Einar. Some Problems Concerning Spherical Harmonics. Almqvist & Wiksells Boktryckeri, 1918.

Warning: These citations may not always be 100% accurate.