Clapham, C., & Corson, D. (1997). Encyclopedia of language and education: Language testing and assessment. Kluwer Academic Publishers.
Chicago-referens (17:e uppl.)Clapham, Caroline, och David Corson. Encyclopedia of Language and Education: Language Testing and Assessment. Dordrecht: Kluwer Academic Publishers, 1997.
MLA-referens (9:e uppl.)Clapham, Caroline, och David Corson. Encyclopedia of Language and Education: Language Testing and Assessment. Kluwer Academic Publishers, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.