Battle, Dolores E.
Elsevier Mosby, 2012
Buku Teks
edited by Snehendu B. Kar, Rina Alcalay
Sage, 2000
Buku Teks
edited by Freddy A. Paniagua, Ann-Marie Yamada
Academic Press, 2013
eBooks
Cummings, Louise, author
Cambridge University Press, 2016
Buku Teks
Ball, Martin J., author
Lawrence Erlbaum Associates, 2005
Buku Teks