Não informado. (1964). Market Research Abstracts. Market Research Society.
Chicago-referens (17:e uppl.)Não informado. Market Research Abstracts. London: Market Research Society, 1964.
MLA-referens (8:e uppl.)Não informado. Market Research Abstracts. Market Research Society, 1964.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.