by Roger Blackwell ... [et al.]
Cengage Learning Asia, 2006
Buku Teks SO
Schiffman, Leon G.
Prentice-Hall, 1997
Buku Teks
Schiffman, Leon G.
Pearson, 2015
Buku Teks SO
Walters, C. Glenn
South Western Publishing, 1989
Buku Teks SO
Schiffman, Leon G.
Pearson Education, Inc., 2007
Buku Teks SO