HART NORMAN A. (2003). PUBLIC RELATIONS AUDIT. CSP LTD.
Chicago Style aipamenaHART NORMAN A. PUBLIC RELATIONS AUDIT. U K: CSP LTD, 2003.
MLA aipamenaHART NORMAN A. PUBLIC RELATIONS AUDIT. CSP LTD, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.