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.
Chicago Style (17. basım) Atıf卡瓦诺 ve 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.
MLA (8th ed.) Atıf卡瓦诺 ve 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.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..