United Nations Interregional Seminar on Petroleum Refining in Developing Countries New Delhi, India, United Nations, & Indian Oil Corporation. (1973). Proceedings of the United Nations Interregional Seminar on Petroleum Refining in Developing Countries, New Delhi, 22 January-3 February 1973. Indian Oil Corporation of the Government of India with the cooperation of the United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations Interregional Seminar on Petroleum Refining in Developing Countries New Delhi, India, United Nations, و Indian Oil Corporation. Proceedings of the United Nations Interregional Seminar on Petroleum Refining in Developing Countries, New Delhi, 22 January-3 February 1973. [India?]: Indian Oil Corporation of the Government of India with the cooperation of the United Nations, 1973.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United Nations Interregional Seminar on Petroleum Refining in Developing Countries New Delhi, India, et al. Proceedings of the United Nations Interregional Seminar on Petroleum Refining in Developing Countries, New Delhi, 22 January-3 February 1973. Indian Oil Corporation of the Government of India with the cooperation of the United Nations, 1973.