APA (7th ed.) Zitazioa

Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), & Omersu, G. (2012). Germany 2012. OECD.

Chicago Style (17th ed.) Zitazioa

Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), eta Gerhard Omersu. Germany 2012. [Paris]: OECD, 2012.

MLA (9th ed.) Zitazioa

Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, et al. Germany 2012. OECD, 2012.