Baron, Robert A.
Allyn and Bacon, 1994
Buku Teks SO
Baron, Robert A.
Heights Allyn and Bacon , 1991
Buku Teks SO
edited by Michael A. Hogg
Sage, 2003
Buku Teks SO
Ashford, Jose B.
Wadsworth, 2001
Buku Teks SO
Ashford, Jose B.
Cengage Learning, 2018
Buku Teks SO