Παραπομπή APA

Steen, L. A., & Seebach, J. A. (1978). Counter examples in topology.

Παραπομπή Chicago Style

Steen, Lynn Arthur, και J Arthur Seebach. Counter Examples in Topology. Springer-Verlag, New York, 1978.

Παραπομπή MLA

Steen, Lynn Arthur, και J Arthur Seebach. Counter Examples in Topology. 1978.