APA Citatie

Gilbert, N. D., & Porter, T. (1994). Knots and surfaces. Oxford University Press.

Chicago Style citaat

Gilbert, N. D., en T. Porter. Knots and Surfaces. Oxford ; New York: Oxford University Press, 1994.

MLA citatie

Gilbert, N. D., en T. Porter. Knots and Surfaces. Oxford University Press, 1994.