Source 1:

Title: Prosocial spending and well-being: Cross-cultural evidence for a psychological universal. Link: https://www.apa.org/pubs/journals/releases/psp-104-4-635.pdf

Source 2:

Title:

Volunteering and depression: the role of psychological and social resources in different age groups

Link: https://www.sciencedirect.com/science/article/pii/S0277953602000254?casa_token=jPr7NiwrtFsAAAAA:ajibZ46y3CgEqDGjFmunuaXfaMtKiNHpesPFSn3p4o3YEj0HRktWIVfytecTOolOgltWAe0

Journal: Social Science & Medicine

Source 3:

Title: Altruistic Social Interest Behaviors Are Associated With Better Mental Health

Link:

https://journals.lww.com/psychosomaticmedicine/Fulltext/2003/09000/Altruistic_Social_Interest_Behaviors_Are.9.aspx?casa_token=2I3l4aVYRt4AAAAA:LFNOc_2LA8API8E9bfTFkRp3M4ao0y3l1KsK-n5-WAzK1eivm-I4yrvTjF7AAz4qWohXpZ1hyPC28i8wXKud