Não informado. (1939). Manchester school of economic and social studies. Basil Blackwell.
Chicago-referens (17:e uppl.)Não informado. Manchester School of Economic and Social Studies. Oxford, Inglaterra: Basil Blackwell, 1939.
MLA-referens (8:e uppl.)Não informado. Manchester School of Economic and Social Studies. Basil Blackwell, 1939.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.