Citazione Stile APA (7a Edizione)
International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Natural gas information (2009 ed.). OECD : International Energy Agency.
Citazione stile Chigago Style (17a edizione)
International Energy Agency, Organisation for Economic Co-operation and Development, e ProQuest (Firm). Natural Gas Information. 2009 ed. Paris: OECD : International Energy Agency, 2009.
Citatione MLA (9a ed.)
International Energy Agency, et al. Natural Gas Information. 2009 ed. OECD : International Energy Agency, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.