Resurssit:
1) http: //www. psycheducation.org/depression/LightTherapy.htm
2-) https://en.wikipedia.org/wiki/Major_depressive_disorder
3) https://www.mentalhealth.org. uk /tiedot /mielenterveysongelmien-yleiskatsaus /tilastot /
4-) https://www.webmd.com/depression/guide/diet-recovery