Não informado. (1978). Journal of the Operational Research Society. Pergamon Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of the Operational Research Society. Oxford, Inglaterra: Pergamon Press, 1978.
Lua MLA (8ú heag.)Não informado. Journal of the Operational Research Society. Pergamon Press, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.