Seidenberg, Bernard
The Free Press, 1976
Buku Teks SO
Vaughan, Graham M.
Pearson Prentice Hall, 2005
Buku Teks SO
edited by Miles Hewstone, Wolfgang Stroebe, Klaus Jonas
John Wiley & Sons, 2012
Buku Teks
Harrison, Brigid C.
Thomson, 2008
Buku Teks SO
Junker, Buford H.
University of Chicago Press, 1960
Buku Teks SO