Villafania, A. (2005). VoIP a value added service, says NTC. Philippine Daily Inquirer.
Chicago Style (17th ed.) CitationVillafania, Alexander. "VoIP a Value Added Service, Says NTC." Philippine Daily Inquirer 2005.
ציטוט MLAVillafania, Alexander. "VoIP a Value Added Service, Says NTC." Philippine Daily Inquirer, 2005.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.