APA
(2002). OPEC Nations and the Global Dialogue on sustainable Development. Vienna,Austria: The OPEC Fund for International Development.
Chicago
2002. OPEC Nations and the Global Dialogue on sustainable Development. Vienna,Austria: The OPEC Fund for International Development.
Harvard
(2002). OPEC Nations and the Global Dialogue on sustainable Development. Vienna,Austria: The OPEC Fund for International Development.
MLA
OPEC Nations and the Global Dialogue on sustainable Development. Vienna,Austria: The OPEC Fund for International Development. 2002.