HEYEL CARL EDT. (1963). ENCYCLOPEDIA OF MANAGEMENT. VAN NASTRRED REINHOLD.
Lua i Stíl Chicago (17ú heag.)HEYEL CARL EDT. ENCYCLOPEDIA OF MANAGEMENT. LONDON: VAN NASTRRED REINHOLD, 1963.
Lua MLA (9ú heag.)HEYEL CARL EDT. ENCYCLOPEDIA OF MANAGEMENT. VAN NASTRRED REINHOLD, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.