ASCOPE Conference and Exhibition Manila, Philippines, & ASCOPE (Organization). (1981). ASCOPE '81, Manila: The 2nd ASEAN Council on Petroleum Conference and Exhibition, Philippine International Convention Center, Manila, October 7-11, 1981. Singapore Office, Edit-Ads Consultants.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ASCOPE Conference and Exhibition Manila, Philippines, و ASCOPE (Organization). ASCOPE '81, Manila: The 2nd ASEAN Council on Petroleum Conference and Exhibition, Philippine International Convention Center, Manila, October 7-11, 1981. [Singapore: Singapore Office, Edit-Ads Consultants, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)ASCOPE Conference and Exhibition Manila, Philippines, و ASCOPE (Organization). ASCOPE '81, Manila: The 2nd ASEAN Council on Petroleum Conference and Exhibition, Philippine International Convention Center, Manila, October 7-11, 1981. Singapore Office, Edit-Ads Consultants, 1981.