Gaya APA

Eyal, N., Hoover, R. (2019). Hooked: How to Building Habit-forming Products (1). Inggris: Penguin.

Gaya MLA

Eyal, NIr., Hoover, Ryan. "Hooked: How to Building Habit-forming Products". 1 Inggris: Penguin, 2019. Printed.