Bennis Warren & Thomas Robert. (2003). Geeks & Geezers: How Era, Values and Defining Moments shape Leaders. Magna Publishing Co.,LTD.
Chicago-čujuhus (17. p.)Bennis Warren juo Thomas Robert. Geeks & Geezers: How Era, Values and Defining Moments Shape Leaders. Mumbai, india: Magna Publishing Co.,LTD, 2003.
MLA-čujuhus (9. p.)Bennis Warren juo Thomas Robert. Geeks & Geezers: How Era, Values and Defining Moments Shape Leaders. Magna Publishing Co.,LTD, 2003.
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