APA (7th ed.) Citation

Thorpe, J. A. (1985). Elementary topics in differential geometry. Springer.

Chicago Style (17th ed.) Citation

Thorpe, John A. Elementary Topics in Differential Geometry. New York [etc.]: Springer, 1985.

MLA (9th ed.) Citation

Thorpe, John A. Elementary Topics in Differential Geometry. Springer, 1985.