Marckwardt, A. (1964). A common language: British and American english. British Broadcasting.
Chicago-referens (17:e uppl.)Marckwardt, Albert. A Common Language: British and American English. Londres, Inglaterra: British Broadcasting, 1964.
MLA-referens (9:e uppl.)Marckwardt, Albert. A Common Language: British and American English. British Broadcasting, 1964.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.