Cita APA (7th ed.)
(2004). OECD environmental performance reviews: Spain. OECD.
Cita Chicago (17th ed.)
OECD Environmental Performance Reviews: Spain. Paris, Cedex, France: OECD, 2004.
Cita MLA (9th ed.)
OECD Environmental Performance Reviews: Spain. OECD, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.