Não informado. (1971). Research Policy. North Holland Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Research Policy. Amsterdam: North Holland Publishing, 1971.
Lua MLA (8ú heag.)Não informado. Research Policy. North Holland Publishing, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.