Khanna, M. L. (1997). Topology (5th ed.). Modern Book Centre.
Chicago Style (17th ed.) ZitazioaKhanna, M. L. Topology. 5th ed. Meerut: Modern Book Centre, 1997.
MLA (9th ed.) ZitazioaKhanna, M. L. Topology. 5th ed. Modern Book Centre, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.