GIFFORD JONATHAN. (2019). 100 GREAT LEADERSHIP IDEAS. EMBASSY BOOKS.
Lua i Stíl Chicago (17ú heag.)GIFFORD JONATHAN. 100 GREAT LEADERSHIP IDEAS. MUMBAI: EMBASSY BOOKS, 2019.
Lua MLA (9ú heag.)GIFFORD JONATHAN. 100 GREAT LEADERSHIP IDEAS. EMBASSY BOOKS, 2019.
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