BLACK JOANNE S. (2006). NO MORE COLD CALLING. WARNER BUSINESS BOOKS.
Chicago-čujuhus (17. p.)BLACK JOANNE S. NO MORE COLD CALLING. NEW YORK: WARNER BUSINESS BOOKS, 2006.
MLA-čujuhus (9. p.)BLACK JOANNE S. NO MORE COLD CALLING. WARNER BUSINESS BOOKS, 2006.
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