Sovereign, S. R. (2011). Fast track to Ubuntu. 9.9 Mediaworx Pvt. Ltd.
芝加哥风格引文Sovereign, Smith Robert. Fast Track to Ubuntu. 9.9 Mediaworx Pvt. Ltd, 2011.
MLA引文Sovereign, Smith Robert. Fast Track to Ubuntu. 9.9 Mediaworx Pvt. Ltd, 2011.
警告：这些引文格式不一定是100％准确.