edited by Angus McIntyre
Oxford University Press, 1988
Buku Teks
Cavanaugh, John C., author
Cengage Learning, cop, 2015
Buku Teks
Lazarus, Richard S., author
Oxford University Press, 2006
Buku Teks
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