Moorhead, Gregory, author
South-Western Cengage Learning, 2012
Buku Teks
Robbins, Stephen P., author
Pearson, 2010
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1994
Buku Teks
Hersey, Paul
Prentice-Hall, 1996
Buku Teks
Hersey, Paul
Prentice-Hall, 1982
Buku Teks