Lectura, L. (2005). Voice over internet protocol to provide stiff competition to phone companies. Malaya.
芝加哥风格引文Lectura, Lenie. "Voice over Internet Protocol to Provide Stiff Competition to Phone Companies." Malaya 2005.
MLA引文Lectura, Lenie. "Voice over Internet Protocol to Provide Stiff Competition to Phone Companies." Malaya, 2005.
警告：这些引文格式不一定是100％准确.