Principi, A., Jensen, P. H., & Lamura, G. (2014). Active ageing: Voluntary work by older people in Europe. Policy Press.
Chicago-referens (17:e uppl.)Principi, Andrea, Per H. Jensen, och Giovanni Lamura. Active Ageing: Voluntary Work by Older People in Europe. Bristol: Policy Press, 2014.
MLA-referens (9:e uppl.)Principi, Andrea, et al. Active Ageing: Voluntary Work by Older People in Europe. Policy Press, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.