Gaya APA

Duckworth, A. (2018). Grit: the power of passion and perseverance (Cetakan III). Jakarta: PT. Gramedia Pustaka Utama.

Gaya MLA

Duckworth, Angela. "Grit: the power of passion and perseverance". Cetakan III Jakarta: PT. Gramedia Pustaka Utama, 2018. Text.