International Business Machines (IBM). IBM leads others in patent leadership for 21st straight year. IN Business News. Manila Bulletin.
Chicago Style (17th ed.) CitationInternational Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin .
MLA citiranjeInternational Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin, .
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