APA Edition Citation

Meik Wiking. (2017). The key to happiness. Penguin Random House.

Chicago Edition Citation

Meik Wiking. The Key to Happiness. UK: Penguin Random House, 2017.

MLA Edition Citation

Meik Wiking. The Key to Happiness. Penguin Random House, 2017.

Warning: These citations may not always be 100% accurate.