APA (7th ed.) Zitazioa
Duckworth, A. (2017). Grit: Why Passion and Resilience are the Secrets to Success. Vermilion.
Chicago Style (17th ed.) Zitazioa
Duckworth, Angela. Grit: Why Passion and Resilience Are the Secrets to Success. London: Vermilion, 2017.
MLA (9th ed.) Zitazioa
Duckworth, Angela. Grit: Why Passion and Resilience Are the Secrets to Success. Vermilion, 2017.
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