Organization for Economic Cooperation and Development. Directorate for Scientific Affairs. (1970). Occupational and educational structures of the labour force and levels of economic development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Organization for Economic Cooperation and Development. Directorate for Scientific Affairs. Occupational and Educational Structures of the Labour Force and Levels of Economic Development. Paris, 1970.
Παραπομπή σε μορφή MLA (9th εκδ.)Organization for Economic Cooperation and Development. Directorate for Scientific Affairs. Occupational and Educational Structures of the Labour Force and Levels of Economic Development. 1970.
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