LOCKE EDWIN A. (1991). ESSENCE OF LEADERSHIP. LEXINGTON BOOKS.
Lua i Stíl Chicago (17ú heag.)LOCKE EDWIN A. ESSENCE OF LEADERSHIP. NEW YORK: LEXINGTON BOOKS, 1991.
Lua MLA (9ú heag.)LOCKE EDWIN A. ESSENCE OF LEADERSHIP. LEXINGTON BOOKS, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.