Slater, R. (2003). 29 leadership secrets from Jack Welch. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Slater, Robert. 29 Leadership Secrets from Jack Welch. McGraw-Hill, 2003.
Lua MLA (8ú heag.)Slater, Robert. 29 Leadership Secrets from Jack Welch. McGraw-Hill, 2003.
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