APA (7th ed.) Citation

Ubuntu Ducumentation Project. (2011). Ubuntu 11.04: Ubuntu classic desktop guide. Fultus.

Chicago Style (17th ed.) Citation

Ubuntu Ducumentation Project. Ubuntu 11.04: Ubuntu Classic Desktop Guide. Palo Alto, Calif.: Fultus, 2011.

MLA (8th ed.) Citation

Ubuntu Ducumentation Project. Ubuntu 11.04: Ubuntu Classic Desktop Guide. Fultus, 2011.