卡瓦诺 & 克拉克. (2010). CCNA语音认证考试指南: CCNA voice official exam certification guide. 人民邮电出版社.
Lua i Stíl Chicago (17ú heag.)卡瓦诺 agus 克拉克. CCNA语音认证考试指南: CCNA Voice Official Exam Certification Guide. 人民邮电出版社, 2010.
Lua MLA (8ú heag.)卡瓦诺 agus 克拉克. CCNA语音认证考试指南: CCNA Voice Official Exam Certification Guide. 人民邮电出版社, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.