APA način citiranja (7. izdanje)
International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Energy policies of IEA countries: Portugal 2009 review. OECD/IEA.
Čikaški stil citiranja (17. izdanje)
International Energy Agency, Organisation for Economic Co-operation and Development, i ProQuest (Firm). Energy Policies of IEA Countries: Portugal 2009 Review. Paris: OECD/IEA, 2009.
MLA način citiranja (9. izdanje)
International Energy Agency, et al. Energy Policies of IEA Countries: Portugal 2009 Review. OECD/IEA, 2009.
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