Cita APA (7th ed.)

International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Natural gas information (2009 ed.). OECD : International Energy Agency.

Cita Chicago (17th ed.)

International Energy Agency, Organisation for Economic Co-operation and Development, i ProQuest (Firm). Natural Gas Information. 2009 ed. Paris: OECD : International Energy Agency, 2009.

Cita MLA (9th ed.)

International Energy Agency, et al. Natural Gas Information. 2009 ed. OECD : International Energy Agency, 2009.