Christophersen, P. (1939). The articles: A study of their theory and use in English. E. Munksgaard.
Chicago-referens (17:e uppl.)Christophersen, Paul. The Articles: A Study of Their Theory and Use in English. Copenhagen: E. Munksgaard, 1939.
MLA-referens (8:e uppl.)Christophersen, Paul. The Articles: A Study of Their Theory and Use in English. E. Munksgaard, 1939.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.