Organisation for Economic Co-operation and Development & ProQuest (Firm). (2007). Policies for a better environment: Progress in Eastern Europe, Caucasus and Central Asia. OECD.
Chicago-referens (17:e uppl.)Organisation for Economic Co-operation and Development och ProQuest (Firm). Policies for a Better Environment: Progress in Eastern Europe, Caucasus and Central Asia. Paris: OECD, 2007.
MLA-referens (9:e uppl.)Organisation for Economic Co-operation and Development och ProQuest (Firm). Policies for a Better Environment: Progress in Eastern Europe, Caucasus and Central Asia. OECD, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.