Citazione Stile APA (7a Edizione)

International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Energy policies of IEA countries: Portugal 2009 review. OECD/IEA.

Citazione stile Chigago Style (17a edizione)

International Energy Agency, Organisation for Economic Co-operation and Development, e ProQuest (Firm). Energy Policies of IEA Countries: Portugal 2009 Review. Paris: OECD/IEA, 2009.

Citatione MLA (9a ed.)

International Energy Agency, et al. Energy Policies of IEA Countries: Portugal 2009 Review. OECD/IEA, 2009.