Canfield, J., & Switzer, J. (2005). The success principles: How to get from where you are to where you want to be. HarperCollins.
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Chicago Style (17th ed.) Zitazioa
Canfield, Jack, eta Janet Switzer. The Success Principles: How to Get from Where You Are to Where You Want to Be. New York: HarperCollins, 2005.
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MLA (9th ed.) Zitazioa
Canfield, Jack, eta Janet Switzer. The Success Principles: How to Get from Where You Are to Where You Want to Be. HarperCollins, 2005.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.