Não informado. (1948). Books in Print: An index to the publishers trade list annual. R.R. Bowker Company.
Chicago-referens (17:e uppl.)Não informado. Books in Print: An Index to the Publishers Trade List Annual. New York: R.R. Bowker Company, 1948.
MLA-referens (8:e uppl.)Não informado. Books in Print: An Index to the Publishers Trade List Annual. R.R. Bowker Company, 1948.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.