edited by Agnieszka Golec de Zavala and Aleksandra Cichocka
Palgrave Macmillan, 2013
Buku Teks
edited by Muzafer Sherif and M.O. Wilson
Harper & Brothers, 1953
Buku Teks
DeLamater, John D.
Colorado Westview Press, 2014
Buku Teks
edited by Michael A. Hogg and R. Scott Tindale
Blackwell, 2003
Buku Teks
Collins, Barry E.
John Wiley & Sons, 1964
Buku Teks