APA (7th ed.) Zitazioa

Principi, A., Jensen, P. H., & Lamura, G. (2014). Active ageing: Voluntary work by older people in Europe. Policy Press.

Chicago Style (17th ed.) Zitazioa

Principi, Andrea, Per H. Jensen, eta Giovanni Lamura. Active Ageing: Voluntary Work by Older People in Europe. Bristol: Policy Press, 2014.

MLA (9th ed.) Zitazioa

Principi, Andrea, et al. Active Ageing: Voluntary Work by Older People in Europe. Policy Press, 2014.