International Business Machines (IBM). IBM leads others in patent leadership for 21st straight year. IN Business News. Manila Bulletin.
Chicago-referens (17:e uppl.)International Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin .
MLA-referens (9:e uppl.)International Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin, .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.