एपीए उद्धरण

Alexandroff, P. (2010). Elementary concepts of Topology. Dover Publications, Inc.

शिकागो स्टाइल उद्धरण

Alexandroff, Paul. Elementary Concepts of Topology. Dover Publications, Inc, 2010.

एमएलए उद्धरण

Alexandroff, Paul. Elementary Concepts of Topology. Dover Publications, Inc, 2010.