"May 2012."
"Based on SCIE's review of research evidence, published in Research briefing 39: Preventing loneliness and social isolation: interventions and outcomes" / Windle, K., Francis, J. and Coomber, C., 2011.
Preventing loneliness and social isolation among older people. Published by Social Care Institute for Excellence in 2012. Publication and catalogue information, links to buy online and reader comments.