Routledge, 1996
Buku Teks
Bornstein, Robert F, author
Washington D.C, 2002
Buku Teks
Lips, Hilary M., author
McGraw-Hill, 2008
Buku Teks
Jacqueline Scott, Shirley Dex, Anke C. Plagnol, editor
Edward Elgar, 2012
Buku Teks
Archer, John, author
Cambridge University Press, 2002
Buku Teks