Steers, Richard M., author
Kent Publishing, 1985
Buku Teks
Margerison, Charles J.
McGraw-Hill , 1973
Buku Teks
Massie, Joseph L., author
Prentice-Hall, 1985
Buku Teks
edited by Susan E. Jackson, Michael A. Hitt and Angelo S. DeNisi
Jossey-Bass, 2003
Buku Teks
Rowley, Jennifer, author
Gower , 2000
Buku Teks