APA (7th ed.) Citation

Gans, D. (1973). An introduction to non-Euclidean geometry. Academic Press.

Chicago Style (17th ed.) Citation

Gans, David. An Introduction to Non-Euclidean Geometry. New York: Academic Press, 1973.

MLA (9th ed.) Citation

Gans, David. An Introduction to Non-Euclidean Geometry. Academic Press, 1973.