EYAL, N. (2014). Hooked how to build habit forming products. Penguin.
Chicago Style (17th ed.) CitationEYAL, Nir. Hooked How to Build Habit Forming Products. Penguin, 2014.
Cita MLAEYAL, Nir. Hooked How to Build Habit Forming Products. Penguin, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.