APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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