توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Merino Garcia, P. (2005). OPEC in the 21st century. What has changed and what have we learned? Oxford Institute for Energy Studies.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Merino Garcia, P. OPEC in the 21st Century. What Has Changed and What Have We Learned? Oxford Institute for Energy Studies, 2005.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Merino Garcia, P. OPEC in the 21st Century. What Has Changed and What Have We Learned? Oxford Institute for Energy Studies, 2005.