APA Citation

Matthew Helmke, & Amber Graner. (2011). The official ubuntu book: Seventh edition. Usa.

Chicago Style Citation

Matthew Helmke, and Amber Graner. The Official Ubuntu Book: Seventh Edition. Usa, 2011.

MLA Citation

Matthew Helmke, and Amber Graner. The Official Ubuntu Book: Seventh Edition. Usa, 2011.

Warning: These citations may not always be 100% accurate.