توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

International Energy Agency. (1981). Annual oil and gas statistics =: Statistiques annuelles des hydrocarbures et du gaz naturel. International Energy Agency, Organisation for Economic Co-operation and Development.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

International Energy Agency. Annual Oil and Gas Statistics =: Statistiques Annuelles Des Hydrocarbures Et Du Gaz Naturel. [Paris]: International Energy Agency, Organisation for Economic Co-operation and Development, 1981.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

International Energy Agency. Annual Oil and Gas Statistics =: Statistiques Annuelles Des Hydrocarbures Et Du Gaz Naturel. International Energy Agency, Organisation for Economic Co-operation and Development, 1981.