APA (7th ed.) Citation

Gómez Urgellés, J. (2012). When straight lines curve: Non-Euclidean geometry. RBA.

Chicago Style (17th ed.) Citation

Gómez Urgellés, Joan. When Straight Lines Curve: Non-Euclidean Geometry. London: RBA, 2012.

MLA (9th ed.) Citation

Gómez Urgellés, Joan. When Straight Lines Curve: Non-Euclidean Geometry. RBA, 2012.

Warning: These citations may not always be 100% accurate.