Porteous, I. R. (2001). Geometric differentiation: For the intelligence of curves and surfaces (2nd ed.). Cambridge, UK ; New York: Cambridge University Press.
Čikaški stil citiranjaPorteous, Ian R. Geometric Differentiation: For the Intelligence of Curves and Surfaces. 2nd ed. Cambridge, UK ; New York: Cambridge University Press, 2001.
MLA način citiranjaPorteous, Ian R. Geometric Differentiation: For the Intelligence of Curves and Surfaces. 2nd ed. Cambridge, UK ; New York: Cambridge University Press, 2001.
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