Não informado. (1931). Credit and financial management. National Association of Credit Management.
Chicago-referens (17:e uppl.)Não informado. Credit and Financial Management. New York: National Association of Credit Management, 1931.
MLA-referens (8:e uppl.)Não informado. Credit and Financial Management. National Association of Credit Management, 1931.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.