European Commission & Energy in Europe DG. (2000). 1999 - Annual Energy Review: Energy in Europe. European Communities.
芝加哥风格引文European Commission 与 Energy in Europe DG. 1999 - Annual Energy Review: Energy in Europe. Luxembourg: European Communities, 2000.
MLA引文European Commission 与 Energy in Europe DG. 1999 - Annual Energy Review: Energy in Europe. European Communities, 2000.
警告：这些引文格式不一定是100％准确.