Argyle, Michael, author
Routledge & Kegan Paul, 2000
Buku Teks
Nietzel, Michael T., author
Prentice-Hall, 1998
Buku Teks
Seidenberg, Bernard
The Free Press, 1976
Buku Teks
Swan, Terry, author
Guardian Books, 2006
Buku Teks
Vaughan, Graham M., author
Pearson Prentice Hall, 2005
Buku Teks