Steen, L. A., & Seebach, J. A. (1978). Counter examples in topology.
Chicago Style aipamenaSteen, Lynn Arthur, and J Arthur Seebach. Counter Examples in Topology. Springer-Verlag, New York, 1978.
MLA aipamenaSteen, Lynn Arthur, and J Arthur Seebach. Counter Examples in Topology. 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.