editor, James E. Birren and K. Warner Schaie
Academic Press, 1990
Buku Referensi
K. Warner Schaie, Sherry L. Willis, editor ; Bob G. Knight, Becca Levy, Denise C. Park, associate editors
Elsevier, 2011
Buku Teks
American Psychological Association, Inc.,, 2018
Majalah, Jurnal, Buletin
Edward J. Masoro, Steven N. Austad
Elsevier , 2011
Buku Teks
Robert H. Binstock, Linda K. George, editor
Elsevier , 2011
Buku Teks