Colvin, G. (2010). Talent is Overrated. Portfolio-Penguin Books.
Lua i Stíl Chicago (17ú heag.)Colvin, Geoff. Talent Is Overrated. London: Portfolio-Penguin Books, 2010.
Lua MLA (9ú heag.)Colvin, Geoff. Talent Is Overrated. Portfolio-Penguin Books, 2010.
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