Não informado. (1972). Library journal/school library journal previews. R.R. Bowker Company.
Chicago-viite (17. p.)Não informado. Library Journal/school Library Journal Previews. New York: R.R. Bowker Company, 1972.
MLA-viite (8. p.)Não informado. Library Journal/school Library Journal Previews. R.R. Bowker Company, 1972.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.