Cita APA (7a ed.)

World Energy Council. (2001). Energy efficience policies and indicators. World Energy Council.

Cita Chicago Style (17a ed.)

World Energy Council. Energy Efficience Policies and Indicators. London: World Energy Council, 2001.

Cita MLA (8a ed.)

World Energy Council. Energy Efficience Policies and Indicators. World Energy Council, 2001.