APA Style

Wiking, M. (2017). The Little Book of Lykke : The Danish ssecrets of the World's Happiest People . New York: HarperCollinsPublishers.

MLA Style

Wiking, Meik. "The Little Book of Lykke : The Danish ssecrets of the World's Happiest People". New York: HarperCollinsPublishers, 2017. Text.