British Petroleum Company. (1970). Our industry petroleum: A handbook dealing with the organisation and functions of an integrated international oil company, with particular reference to the British Petroleum company ltd (4th ed.).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)British Petroleum Company. Our Industry Petroleum: A Handbook Dealing with the Organisation and Functions of an Integrated International Oil Company, with Particular Reference to the British Petroleum Company Ltd. 4th ed. London, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)British Petroleum Company. Our Industry Petroleum: A Handbook Dealing with the Organisation and Functions of an Integrated International Oil Company, with Particular Reference to the British Petroleum Company Ltd. 4th ed. 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.