OECD & Organisation for Economic Co-Operation and Development. (2010). Bío Bío Region, Chile. OECD.
Chicago-čujuhus (17. p.)OECD juo Organisation for Economic Co-Operation and Development. Bío Bío Region, Chile. París: OECD, 2010.
MLA-čujuhus (9. p.)OECD juo Organisation for Economic Co-Operation and Development. Bío Bío Region, Chile. OECD, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.