Villegas, B. M. (1999). It is investing time again. IN Business and society [column]. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillegas, Bernardo M. "It Is Investing Time Again. IN Business and Society [column]." Manila Bulletin 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillegas, Bernardo M. "It Is Investing Time Again. IN Business and Society [column]." Manila Bulletin, 1999.
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