Carrell, Michael R.
Macmillan, 1992
Buku Teks SO
Milkovich, George T.
Tex Business Publications , 1985
Buku Teks SO
Odiorne, George S.
Dow Jones-Irwin, 1982
Buku Teks
Strauss, George
Prentice-Hall, 1980
Buku Teks
Strauss, George
Prentice Hall of India, 1985
Buku Teks