APA (7e ed.) Bronvermelding

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2009). Piedmont, Italy. OECD.

Chicago (17e ed.) Bronvermelding

Organisation for Economic Co-operation and Development en ProQuest (Firm). Piedmont, Italy. Paris: OECD, 2009.

MLA (9e ed.) Bronvermelding

Organisation for Economic Co-operation and Development en ProQuest (Firm). Piedmont, Italy. OECD, 2009.

Let op: Deze citaties zijn niet altijd 100% accuraat.