एपीए उद्धरण

Geiges, H. (2008). Introduction to contact topology. Cambridge University Press.

शिकागो स्टाइल उद्धरण

Geiges, Hansjorg. Introduction to Contact Topology. Cambridge ; New York: Cambridge University Press, 2008.

एमएलए उद्धरण

Geiges, Hansjorg. Introduction to Contact Topology. Cambridge University Press, 2008.