Jack Kitaeff, editor
Routledge, 2011
Buku Teks
edited by P.J.D. Drenth ... [and others]
Wiley, 1984
Buku Teks
K. Warner Schaie, Sherry L. Willis, editor ; Bob G. Knight, Becca Levy, Denise C. Park, associate editors
Elsevier, 2011
Buku Teks
Young, Kimball, author
Trench, Trubner, 1946
Buku Referensi
edited by Raymond F. Paloutzion, Crystal L. Park
Guilford Press, 2013
Buku Teks