Lever, R. Facebook buys messaging service WhatsApp for 19 B. IN Business News. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLever, Rob. "Facebook Buys Messaging Service WhatsApp for 19 B. IN Business News." Manila Bulletin .
एमएलए (9वां संस्करण) प्रशस्ति पत्रLever, Rob. "Facebook Buys Messaging Service WhatsApp for 19 B. IN Business News." Manila Bulletin, .
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