APA (7th ed.) Citation

Kulczycki, S. (1961). Non-Euclidean geometry. Pergamon Press [u.a.].

Chicago Style (17th ed.) Citation

Kulczycki, Stefan. Non-Euclidean Geometry. New York [u.a.]: Pergamon Press [u.a.], 1961.

MLA (9th ed.) Citation

Kulczycki, Stefan. Non-Euclidean Geometry. Pergamon Press [u.a.], 1961.