Citazione Stile APA (7a Edizione)

Psacharopoulos, G. (1980). Information, an essential factor in educational planning and policy. Unesco.

Citazione stile Chigago Style (17a edizione)

Psacharopoulos, George. Information, an Essential Factor in Educational Planning and Policy. Paris: Unesco, 1980.

Citatione MLA (9a ed.)

Psacharopoulos, George. Information, an Essential Factor in Educational Planning and Policy. Unesco, 1980.