एपीए उद्धरण

Bonola, R. (1955). Non-Euclidean geometry: A critical and historical study of its development. Dover Publications.

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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