DRUCKER PETER F. (1968). PRACTICE OF MANAGEMENT. PAN BOOKS LTD.
Lua i Stíl Chicago (17ú heag.)DRUCKER PETER F. PRACTICE OF MANAGEMENT. GREAT BRITAIN: PAN BOOKS LTD, 1968.
Lua MLA (9ú heag.)DRUCKER PETER F. PRACTICE OF MANAGEMENT. PAN BOOKS LTD, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.