(1996). Environmental performance in OECD Countries: Progress in the 1990s. Paris: Organisation for Economic Co-operation and Development.
Παραπομπή Chicago StyleEnvironmental Performance in OECD Countries: Progress in the 1990s. Paris: Organisation for Economic Co-operation and Development, 1996.
Παραπομπή MLAEnvironmental Performance in OECD Countries: Progress in the 1990s. Paris: Organisation for Economic Co-operation and Development, 1996.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.