APA (7th ed.) Citation

Helmke, M., Hudson, A., & Hudson, P. (2013). Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition (9th edition.). Sams.

Chicago Style (17th ed.) Citation

Helmke, Matthew, Andrew Hudson, and Paul Hudson. Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition. 9th edition. Sams, 2013.

MLA (9th ed.) Citation

Helmke, Matthew, et al. Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition. 9th edition. Sams, 2013.