Bonola, R. Non-euclidean geometry: A critical and historical study of its developments.
Citazione stile Chigago Style (17a edizione)Bonola, Roberto. Non-euclidean Geometry: A Critical and Historical Study of Its Developments.
Citatione MLA (8a ed.)Bonola, Roberto. Non-euclidean Geometry: A Critical and Historical Study of Its Developments.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.