Etnier, J. L. (2009). Bring your "A" game: A young athlete's guide to mental toughness. University of North Carolina Press.
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Chicago Style (17th ed.) Zitazioa
Etnier, Jennifer L. Bring Your "A" Game: A Young Athlete's Guide to Mental Toughness. Chapel Hill: University of North Carolina Press, 2009.
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MLA (9th ed.) Zitazioa
Etnier, Jennifer L. Bring Your "A" Game: A Young Athlete's Guide to Mental Toughness. University of North Carolina Press, 2009.
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