Gupta, B. (1997). Topology: With complete metric analysis. Kedar Nath ram Nath.
Cita Chicago (17th ed.)Gupta, B.D. Topology: With Complete Metric Analysis. Meerut: Kedar Nath ram Nath, 1997.
Cita MLA (9th ed.)Gupta, B.D. Topology: With Complete Metric Analysis. Kedar Nath ram Nath, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.