Não informado. (1948). Books in Print: An index to the publishers trade list annual. R.R. Bowker Company.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Books in Print: An Index to the Publishers Trade List Annual. New York: R.R. Bowker Company, 1948.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Books in Print: An Index to the Publishers Trade List Annual. R.R. Bowker Company, 1948.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.