Abadilla, E. V. (2003). His calling is call centers. Philippine Graphic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbadilla, Emmie V. "His Calling Is Call Centers." Philippine Graphic 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbadilla, Emmie V. "His Calling Is Call Centers." Philippine Graphic, 2003.
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