International Press Institute & International Press Institute. (1962). Professional secrecy and the journalist. s.n.
Chicago Style aipamenaInternational Press Institute and International Press Institute. Professional Secrecy and the Journalist. Zurich: s.n, 1962.
MLA aipamenaInternational Press Institute and International Press Institute. Professional Secrecy and the Journalist. s.n, 1962.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.