edited by Chris Phillipson and Dale Dannefer
SAGE Publications, 2010
Buku Teks
Lior Gideon
Springer Science, 2012
eBooks
Hillier, Susan
Wadsworth and Cengage Learning, 2011
Buku Teks
Cambridge University Press, 2005
Buku Teks
International Association of Gerontology; edited by Clark Tibbitts and Wilma Donahue
Columbia University Press, 1962
Buku Teks SO