(2016). Energy, transport and environment indicators (2015 ed.). Publications Office of the European Union.
Chicago-Zitierstil (17. Ausg.)Energy, Transport and Environment Indicators. 2015 ed. Luxembourg: Publications Office of the European Union, 2016.
MLA-Zitierstil (8. Ausg.)Energy, Transport and Environment Indicators. 2015 ed. Publications Office of the European Union, 2016.
警告：这些引文格式不一定是100％准确.