APA (7th ed.) Citation

Addison, J., Howison, S., & King, J. (2006). Ray methods for free boundary problems.

Chicago Style (17th ed.) Citation

Addison, J., S. Howison, and J. King. Ray Methods for Free Boundary Problems. 2006.

MLA (9th ed.) Citation

Addison, J., et al. Ray Methods for Free Boundary Problems. 2006.