Dyfyniad APA

Eyal, N. (2014). Hooked: How to build habit-forming products. Portfolio/Penguin.

Dyfyniad Arddull Chicago

Eyal, Nir. Hooked: How to Build Habit-forming Products. London: Portfolio/Penguin, 2014.

Dyfyniad MLA

Eyal, Nir. Hooked: How to Build Habit-forming Products. Portfolio/Penguin, 2014.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.