Gaya APA
Duckworth, A. (2018).
GRIT the power of passion and perseverance (first edition).
New York:
SIMON & SCHUSTER PAPERBACKS.
Gaya MLA
Duckworth, Angela.
"GRIT the power of passion and perseverance".
first edition
New York:
SIMON & SCHUSTER PAPERBACKS,
2018.
Art Original.