DRUCKER , P. (1982). THE CHANGING WORLD OF THE EDECUTIVE. TIMES BOOKS.
Lua i Stíl Chicago (17ú heag.)DRUCKER , P.F. THE CHANGING WORLD OF THE EDECUTIVE. NEW YORK: TIMES BOOKS, 1982.
Lua MLA (9ú heag.)DRUCKER , P.F. THE CHANGING WORLD OF THE EDECUTIVE. TIMES BOOKS, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.