DRUCKER PETER F. (1981). MANAGING IN TURBULENT TIMES. PAN BOOKS LTD.
Lua i Stíl Chicago (17ú heag.)DRUCKER PETER F. MANAGING IN TURBULENT TIMES. LONDON: PAN BOOKS LTD, 1981.
Lua MLA (9ú heag.)DRUCKER PETER F. MANAGING IN TURBULENT TIMES. PAN BOOKS LTD, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.