Citazione APA

Bonola, R., Bólyai, J., & Lobachevskiĭ, N. I. (1955). Non-Euclidean geometry: A critical and historical study of its development. Dover Publications.

Stile di citazione Chicago

Bonola, Roberto, János Bólyai, e N. I. Lobachevskiĭ. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. [New York]: Dover Publications, 1955.

Citazione MLA

Bonola, Roberto, et al. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. Dover Publications, 1955.