Sharma, J. N. (1995). Differential Geometry (12th ed.). Krishna Prakashan.
Cita Chicago (17th ed.)Sharma, J. N. Differential Geometry. 12th ed. Meerut: Krishna Prakashan, 1995.
Cita MLA (9th ed.)Sharma, J. N. Differential Geometry. 12th ed. Krishna Prakashan, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.