Nairne, James S.
Books Cole Pub. , 1996
Buku Teks
Carmichael, Leonard, author
Random House, 1957
Buku Teks
Ratcliffe, Matthew, author
Palgrave Macmillan, 2007
Buku Teks
Glory Gracia Christabelle, author
Fakultas Psikologi Universitas Indonesia, 2005
UI - Tesis (Membership)
Stanley, Thomas J., author
Andrews McMeel, 2000
Buku Teks