APA-referens

Porteous, I. R. (2001). Geometric differentiation: For the intelligence of curves and surfaces (2nd ed.). Cambridge University Press.

Chicago-stil citat

Porteous, Ian R. Geometric Differentiation: For the Intelligence of Curves and Surfaces. 2nd ed. Cambridge: Cambridge University Press, 2001.

MLA-referens

Porteous, Ian R. Geometric Differentiation: For the Intelligence of Curves and Surfaces. 2nd ed. Cambridge University Press, 2001.