Wiking, M. (2017). The little book of lykke: Secrets of the world's happiest people.
Cita Chicago Style (17a ed.)Wiking, Meik. The Little Book of Lykke: Secrets of the World's Happiest People. 2017.
Cita MLA (8a ed.)Wiking, Meik. The Little Book of Lykke: Secrets of the World's Happiest People. 2017.
Precaución: Estas citas no son 100% exactas.