APA (7th ed.) Citation

Willmore, T. (1959). An introduction to differential geometry. Clarendon Press.

Chicago Style (17th ed.) Citation

Willmore, Thomas. An Introduction to Differential Geometry. Oxford: Clarendon Press, 1959.

MLA (9th ed.) Citation

Willmore, Thomas. An Introduction to Differential Geometry. Clarendon Press, 1959.

Warning: These citations may not always be 100% accurate.