APA (7th ed.) Citation
Helliwell, J., & et al. (2019). World Happiness Report 2019. Sustainable Development Solutions Network.
Chicago Style (17th ed.) Citation
Helliwell, J., and et al. World Happiness Report 2019. New York: Sustainable Development Solutions Network, 2019.
MLA (9th ed.) Citation
Helliwell, J., and et al. World Happiness Report 2019. Sustainable Development Solutions Network, 2019.
Warning: These citations may not always be 100% accurate.