APA citiranje

(1979). OPEC national oil company profiles. Secretariat, Organization of the Petroleum Exporting Countries.

Chicago Style (17th ed.) Citation

OPEC National Oil Company Profiles. Vienna: Secretariat, Organization of the Petroleum Exporting Countries, 1979.

MLA citiranje

OPEC National Oil Company Profiles. Secretariat, Organization of the Petroleum Exporting Countries, 1979.