(1981). Educational Statistics in OECD Countries. Organisation for Economic Co Operation and Development.
Lua i Stíl Chicago (17ú heag.)Educational Statistics in OECD Countries. Organisation for Economic Co Operation and Development, 1981.
Lua MLA (8ú heag.)Educational Statistics in OECD Countries. Organisation for Economic Co Operation and Development, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.