Kausler, Donald H.
Springer , 1991
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
Indah Fitriani, author
Fakultas Kedokteran Universitas Indonesia, 2018
UI - Skripsi (Membership)
Irene Ariani, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Skripsi (Membership)