Quadagno, Jill S., author
St. Martin's Press, 1980
Buku Teks
International Association of Gerontology; edited by Clark Tibbitts and Wilma Donahue
Columbia University Press, 1962
Buku Teks
K. Warner Schaie, Sherry L. Willis, editor ; Bob G. Knight, Becca Levy, Denise C. Park, associate editors
Elsevier, 2011
Buku Teks
Kenney, Richard A.
Year Book Medical, 1982
Buku Teks
by Yoichi Okazaki [and others]
Foreign Press Center, 1990
Buku Teks