APA-referens (7:e uppl.)
Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), & Omersu, G. (2012). Deutschland 2012. OECD.
Chicago-referens (17:e uppl.)
Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), och Gerhard Omersu. Deutschland 2012. [Paris]: OECD, 2012.
MLA-referens (9:e uppl.)
Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, et al. Deutschland 2012. OECD, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.