Psacharopoulos, G. (1980). Information, an essential factor in educational planning and policy. Unesco.
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Dyfyniad Arddull Chicago
Psacharopoulos, George. Information, an Essential Factor in Educational Planning and Policy. Paris: Unesco, 1980.
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Dyfyniad MLA
Psacharopoulos, George. Information, an Essential Factor in Educational Planning and Policy. Unesco, 1980.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.