Organisation for Economic Co-operation and Development, Statistical Office of the European Communities, & ProQuest (Firm). (2008). Detailed tables by service category, 1997-2006: Tableaux detailles par categories de services, 1997-2006. OECD.

Organisation for Economic Co-operation and Development, Statistical Office of the European Communities, and ProQuest (Firm). Detailed Tables by Service Category, 1997-2006: Tableaux Detailles Par Categories De Services, 1997-2006. Paris: OECD, 2008.

Organisation for Economic Co-operation and Development, et al. Detailed Tables by Service Category, 1997-2006: Tableaux Detailles Par Categories De Services, 1997-2006. OECD, 2008.