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