Hill, B. M., Rankin, K., Helmke, M., Bacon, J., Burger, C., & Jesse, J. (2010). The official Ubuntu book (5th ed.). Upper Saddle River, N.J.: Prentice Hall.

Hill, Benjamin Mako, Kyle Rankin, Matthew Helmke, Jono Bacon, Corey Burger, and Jonathan Jesse. The Official Ubuntu Book. 5th ed. Upper Saddle River, N.J.: Prentice Hall, 2010.

Hill, Benjamin Mako, et al. The Official Ubuntu Book. 5th ed. Upper Saddle River, N.J.: Prentice Hall, 2010.