SANBORN MARK. (2004). FRED FACTOR: HOW PASSION IN YOUR?.EXTRAORDINARY. DOUBLEDAY.
Chicago-čujuhus (17. p.)SANBORN MARK. FRED FACTOR: HOW PASSION IN YOUR?.EXTRAORDINARY. NEW YORK: DOUBLEDAY, 2004.
MLA-čujuhus (9. p.)SANBORN MARK. FRED FACTOR: HOW PASSION IN YOUR?.EXTRAORDINARY. DOUBLEDAY, 2004.
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