Gupta, D. P. P. (2000). Tensors and differential geometry. Pragati.
Cita Chicago (17th ed.)Gupta, Dr. P. P. Tensors and Differential Geometry. Merrut: Pragati, 2000.
Cita MLA (9th ed.)Gupta, Dr. P. P. Tensors and Differential Geometry. Pragati, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.