Freeman, C., & Young, A. J. (1965). The research and development effort in Western Europe, North America and the Soviet Union: An experimental international comparison of research expenditures and manpower in 1962. Organisation for Economic Co-operation and Development.
Citación estilo ChicagoFreeman, C., and A. J. Young. The Research and Development Effort in Western Europe, North America and the Soviet Union: An Experimental International Comparison of Research Expenditures and Manpower in 1962. [Paris]: Organisation for Economic Co-operation and Development, 1965.
Cita MLAFreeman, C., and A. J. Young. The Research and Development Effort in Western Europe, North America and the Soviet Union: An Experimental International Comparison of Research Expenditures and Manpower in 1962. [Paris]: Organisation for Economic Co-operation and Development, 1965.