Bonola, R. (1912). Non-Euclidean geometry: A critical and historical study of its development. Open Court Publ. Co.
Chicago-Zitierstil (17. Ausg.)Bonola, Roberto. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. Chicago, Ill: Open Court Publ. Co, 1912.
MLA-Zitierstil (9. Ausg.)Bonola, Roberto. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. Open Court Publ. Co, 1912.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.