Diamond, Jared, author
Seven Stories Press, 2014
Buku Teks
Gould, W.T.S., author
John Wiley, Longman Scientific, 1993
Buku Teks
Peter Aggleton, Jane Hurry, Ian Warwick, editor
John Wiley & Sons, 2000
Buku Teks
Rutter, Michael, author
Cambridge University Press, 1998
Buku Teks
Reid, Hazel, author
Learning Matters, 2011
Buku Teks