Psacharopoulos, G. (1991). The economic impact of education: Lessons for policy makers. ICB Press.
Lua i Stíl Chicago (17ú heag.)Psacharopoulos, George. The Economic Impact of Education: Lessons for Policy Makers. San Francisco: ICB Press, 1991.
Lua MLA (8ú heag.)Psacharopoulos, George. The Economic Impact of Education: Lessons for Policy Makers. ICB Press, 1991.
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