Cita APA (7a ed.)

International Energy Agency. (1999). Oil, Gas, Coal and Electricity: Quarterly Statistics Second Quarter 1999 Volume 1999 Issue 4. OECD Publishing.

Cita Chicago Style (17a ed.)

International Energy Agency. Oil, Gas, Coal and Electricity: Quarterly Statistics Second Quarter 1999 Volume 1999 Issue 4. Washington, D.C.: OECD Publishing, 1999.

Cita MLA (9a ed.)

International Energy Agency. Oil, Gas, Coal and Electricity: Quarterly Statistics Second Quarter 1999 Volume 1999 Issue 4. OECD Publishing, 1999.