APA (7th ed.) Citation

Sommerville, D. M. Y. (1958). The elements of non-Euclidean geometry / by D.M.Y. Sommerville. Dover Pubs.

Chicago Style (17th ed.) Citation

Sommerville, D. M. Y. The Elements of Non-Euclidean Geometry / by D.M.Y. Sommerville. Dover Pubs, 1958.

MLA (9th ed.) Citation

Sommerville, D. M. Y. The Elements of Non-Euclidean Geometry / by D.M.Y. Sommerville. Dover Pubs, 1958.

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