Castro, P. (2007). Convergys cites continued Philippine growth, positive on RP BPO market. Enterprise.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCastro, PA. "Convergys Cites Continued Philippine Growth, Positive on RP BPO Market." Enterprise 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCastro, PA. "Convergys Cites Continued Philippine Growth, Positive on RP BPO Market." Enterprise, 2007.
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