*{{citechú bookthích sách |last = Kelley |first = John | title = General Topology |year= 1975 | publisher = Springer | isbn = 0-387-90125-6}}
*{{citechú bookthích sách | last = Munkres | first = James | year = 1999 | title = Topology | edition = 2nd | publisher = Prentice Hall | isbn = 0-13-181629-2}}
*{{Citechú bookthích sách | last1=Steen | first1=Lynn Arthur | author1-link=Lynn Arthur Steen | last2=Seebach | first2=J. Arthur Jr. | author2-link=J. Arthur Seebach, Jr. | title=[[Counterexamples in Topology]] | origyear=1978 | publisher=[[Springer-Verlag]] | location=Berlin, New York | edition=[[Dover Publications|Dover]] reprint of 1978 | isbn=978-0-486-68735-3 | mr=507446 | year=1995 | postscript=<!--None-->}}
*{{citechú bookthích sách | last = Willard | first = Stephen | title = General Topology | publisher = Addison-Wesley | year = 1970 | isbn = 0-486-43479-6 (Dover edition)}}
