Bonola, R., Bólyai, J., & Lobachevskiĭ, N. I. 1. (1955). Non-Euclidean geometry: A critical and historical study of its development. [New York]: Dover Publications.
استشهاد بنمط شيكاغوBonola, Roberto, János Bólyai, و N. I. 1792-1856 Lobachevskiĭ. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. [New York]: Dover Publications, 1955.
MLA استشهادBonola, Roberto, János Bólyai, و N. I. 1792-1856 Lobachevskiĭ. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. [New York]: Dover Publications, 1955.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.