Freeman, C. (1962). The research and development effort in Western Europe, North America and the Soviet Union. Paris: Organisation for Economic Co-operation and Development.
Trích dẫn kiểu ChicagoFreeman, C. The Research and Development Effort in Western Europe, North America and the Soviet Union. Paris: Organisation for Economic Co-operation and Development, 1962.
MLA引文Freeman, C. The Research and Development Effort in Western Europe, North America and the Soviet Union. Paris: Organisation for Economic Co-operation and Development, 1962.
警告：這些引文格式不一定是100％准確.