Polster, B., & Steinke, G. (2001). Geometries on surfaces. Cambridge ; New York: Cambridge University Press.
Čikaški stil citiranjaPolster, Burkard, i Gnter Steinke. Geometries On Surfaces. Cambridge ; New York: Cambridge University Press, 2001.
MLA način citiranjaPolster, Burkard, i Gnter Steinke. Geometries On Surfaces. Cambridge ; New York: Cambridge University Press, 2001.
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