(1997). 3 firms vow to observe IPR laws. Manila Bulletin.
Chicago Style (17th ed.) Citation"3 Firms Vow to Observe IPR Laws." Manila Bulletin 1997.
MLA引文"3 Firms Vow to Observe IPR Laws." Manila Bulletin, 1997.
警告：這些引文格式不一定是100％准確.
APA引文