एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

Porteous , I. R. Geometric Differentiation: For the Intelligences of Curves and Surfaces.-2nd Ed. 2nd ed. Cambridge: Cambridge University Press, 2001.

एमएलए उद्धरण

Porteous , I. R. Geometric Differentiation: For the Intelligences of Curves and Surfaces.-2nd Ed. 2nd ed. Cambridge University Press, 2001.