International Business Machines (IBM). IBM leads others in patent leadership for 21st straight year. IN Business News. Manila Bulletin.
芝加哥风格引文International Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin .
MLA引文International Business Machines (IBM). "IBM Leads Others in Patent Leadership for 21st Straight Year. IN Business News." Manila Bulletin, .
警告：这些引文格式不一定是100％准确.