(1971). International guide to educational documentation (2d ed.). Unesco.
Lua i Stíl Chicago (17ú heag.)International Guide to Educational Documentation. 2d ed. Paris: Unesco, 1971.
Lua MLA (9ú heag.)International Guide to Educational Documentation. 2d ed. Unesco, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.