Freeman, C. (1965). The research and development effort in western Europe, North America and the Soviet Union. Paris: OECD.
Citación estilo ChicagoFreeman, C. The Research and Development Effort in Western Europe, North America and the Soviet Union. Paris: OECD, 1965.
Cita MLAFreeman, C. The Research and Development Effort in Western Europe, North America and the Soviet Union. Paris: OECD, 1965.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.