Franzoi, Stephen L., author
McGraw-Hill, Higher Education, 2009
Buku Teks
Myers, David G., author
McGrow-Hill , 1987
Buku Teks
Sargent, S. W. Stansfeld, author
The Ronald Press, 1966
Buku Teks
Sherif, Muzafer, author
Harper Row, 1969
Buku Teks
editor Kurt W. Back
John Wiley, 1972
Buku Teks