Não informado. (2009). Main Science and Technology Indicators. Organization for Economic Co-operation and Development.
Citação do estilo Chicago (17ª ed.)Não informado. Main Science and Technology Indicators. Paris: Organization for Economic Co-operation and Development, 2009.
Citação MLA (8ª ed.)Não informado. Main Science and Technology Indicators. Organization for Economic Co-operation and Development, 2009.
警告:这些引文格式不一定是100%准确.