Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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