Gaya APA

Duckworth, A. (2017). GRIT WHY PASSION AND RESILIENCE ARE THE SECRETS TO SUCCESS (cet. 1). New York: PENGUIN RANDOM HOUSE.

Gaya MLA

Duckworth, Angela. "GRIT WHY PASSION AND RESILIENCE ARE THE SECRETS TO SUCCESS". cet. 1 New York: PENGUIN RANDOM HOUSE, 2017. Text.