OPEC at a glance.
APA Citation
Organization of Petroleum Exporting Countries. (1980). OPEC at a glance. Vienna, Austria: Organization of the Petroleum Exporting Countries.
MLA Citation
Organization of Petroleum Exporting Countries. OPEC At a Glance. Vienna, Austria: Organization of the Petroleum Exporting Countries, 1980.
Warning: These citations may not always be complete (especially for serials).