APA (7th ed.) Citation

Kay, A., Kay, A., & McColl, W. (1991). Angle and distance geometry problems.

Chicago Style (17th ed.) Citation

Kay, A., Andrew Kay, and W. McColl. Angle and Distance Geometry Problems. 1991.

MLA (9th ed.) Citation

Kay, A., et al. Angle and Distance Geometry Problems. 1991.

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