Lean Mei Li, Mya Khemlani David, Ngew Yeok Meng, editor
University of Malaya, 2011
Buku Teks
Glenda Tibe Bonifacio
Springer, 2012
eBooks
Moghaddam, Fathali M., author
W.H. Freeman, 1993
Buku Teks
Lindzey, Gardner, author
Appleton Century Crofts, 1961
Buku Teks
edited by L. Riddick Lynch
Fairleigh Dickinson University Press, 1969
Buku Teks