Bonola, R., & Carslaw, H. S. (1912). Non-Euclidean geometry: A critical and historical study of its development. Open Court Pub. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBonola, Roberto, और H. S. Carslaw. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. Chicago: Open Court Pub. Co., 1912.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBonola, Roberto, और H. S. Carslaw. Non-Euclidean Geometry: A Critical and Historical Study of Its Development. Open Court Pub. Co., 1912.
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