Παραπομπή APA

Steen, L., & Seebach, J. J. (1978). Counter examples in topology.-2nd ed (2nd ed.). Springer.

Παραπομπή Chicago Style

Steen, L.A, και J.A. Jr Seebach. Counter Examples in Topology.-2nd Ed. 2nd ed. New York: Springer, 1978.

Παραπομπή MLA

Steen, L.A, και J.A. Jr Seebach. Counter Examples in Topology.-2nd Ed. 2nd ed. Springer, 1978.