Não informado. (1970). International Journal of Systems Science. Taylor & Francis.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal of Systems Science. Hants, Inglaterra: Taylor & Francis, 1970.
Lua MLA (8ú heag.)Não informado. International Journal of Systems Science. Taylor & Francis, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.