Não informado. (1972). Library journal/school library journal previews. R.R. Bowker Company.
Chicago-referens (17:e uppl.)Não informado. Library Journal/school Library Journal Previews. New York: R.R. Bowker Company, 1972.
MLA-referens (8:e uppl.)Não informado. Library Journal/school Library Journal Previews. R.R. Bowker Company, 1972.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.