APA (7th ed.) Citation

Sommerville, D. M. Y. (1958). An Introduction to the geometry of N dimentions. Dover Publications.

Chicago Style (17th ed.) Citation

Sommerville, D. M. Y. An Introduction to the Geometry of N Dimentions. New York: Dover Publications, 1958.

MLA (9th ed.) Citation

Sommerville, D. M. Y. An Introduction to the Geometry of N Dimentions. Dover Publications, 1958.