APA (7th ed.) Citation

Organization of the Petroleum Exporting Countries. (1992). Facts and figures: A graphical analysis of world energy up to 1991. OPEC.

Chicago Style (17th ed.) Citation

Organization of the Petroleum Exporting Countries. Facts and Figures: A Graphical Analysis of World Energy Up to 1991. Vienna: OPEC, 1992.

MLA (9th ed.) Citation

Organization of the Petroleum Exporting Countries. Facts and Figures: A Graphical Analysis of World Energy Up to 1991. OPEC, 1992.