APA (7th ed.) Citation

Kulczycki, S. (1961). Non-Euclidean geometry. Pergamon Press.

Chicago Style (17th ed.) Citation

Kulczycki, Stefan. Non-Euclidean Geometry. New York: Pergamon Press, 1961.

MLA (8th ed.) Citation

Kulczycki, Stefan. Non-Euclidean Geometry. Pergamon Press, 1961.