Não informado. (1978). Key to economic science and managerial sciences. Martinus Nijhoff.
Lua i Stíl Chicago (17ú heag.)Não informado. Key to Economic Science and Managerial Sciences. The Hague, Holanda: Martinus Nijhoff, 1978.
Lua MLA (8ú heag.)Não informado. Key to Economic Science and Managerial Sciences. Martinus Nijhoff, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.