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