Cita APA (7a ed.)

Helmke, M., Hudson, A., & Hudson, P. (2012). Ubuntu unleashed (2013 ed.). Sams.

Cita Chicago Style (17a ed.)

Helmke, Matthew, Andrew Hudson, y Paul Hudson. Ubuntu Unleashed. 2013 ed. Indianapolis, Ind.: Sams, 2012.

Cita MLA (8a ed.)

Helmke, Matthew, et al. Ubuntu Unleashed. 2013 ed. Sams, 2012.