Não informado. (1970). Policy Sciences. Kluwer Academic Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Policy Sciences. Dordrecht, Holanda: Kluwer Academic Publishers, 1970.
Lua MLA (8ú heag.)Não informado. Policy Sciences. Kluwer Academic Publishers, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.