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Чикаго-гийн эшлэл (17 дахь хэвлэлт)Organisation for Economic Co-operation and Development, Statistical Office of the European Communities, ба ProQuest (Firm). OECD Statistics on International Trade in Services: Statistiques De L'OCDE Sur Les Echanges Internationaux De Services.1999-2007. Tableaux Detailles Par Categories De Services. Paris, France: Organisation for Economic Co-operation and Development, 2009.
MLA -ийн эшлэл (9 дэх хэвлэлт)Organisation for Economic Co-operation and Development, et al. OECD Statistics on International Trade in Services: Statistiques De L'OCDE Sur Les Echanges Internationaux De Services.1999-2007. Tableaux Detailles Par Categories De Services. Organisation for Economic Co-operation and Development, 2009.