Não informado. (1952). Public relations. Institute of Public Relations.
Lua i Stíl Chicago (17ú heag.)Não informado. Public Relations. London: Institute of Public Relations, 1952.
Lua MLA (8ú heag.)Não informado. Public Relations. Institute of Public Relations, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.