Robbins, Stephen P., author
Pearson, 2016
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 2002
Buku Teks
Koontz, Harold, author
Erlangga, 1980
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 2009
Buku Teks
Nilsen, Don L. F.
Regents Publishing, 1973
Buku Teks