APA (7th ed.) Citation
Chei, C., & et al. (2018). Happy older people live longer.
Chicago Style (17th ed.) Citation
Chei, C.L, and et al. Happy Older People Live Longer. 2018.
MLA (9th ed.) Citation
Chei, C.L, and et al. Happy Older People Live Longer. 2018.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.