Bornstein, Robert F
Washington D.C, 2002
Buku Teks
Lips, Hilary M.
McGraw-Hill, 2008
Buku Teks
Jacqueline Scott, Shirley Dex, Anke C. Plagnol, editor
Edward Elgar, 2012
Buku Teks
Archer, John
Cambridge University Press, 2002
Buku Teks
Rahayu Relawati
Muara Indah, 2011
Buku Teks