Sinaulan, Richard Wantian, author
1983
UI - Skripsi (Membership)
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
Yeni Rachmawati, author
Kencana Prenada Media, 2011
Buku Teks
Artikel Jurnal