Não informado. (1980). International Journal of Operations & Production Management. MCB University Press.
Lua i Stíl Chicago (17ú heag.)Não informado. International Journal of Operations & Production Management. Bradford, Inglaterra: MCB University Press, 1980.
Lua MLA (8ú heag.)Não informado. International Journal of Operations & Production Management. MCB University Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.