Hitt, Michael A., author
West Publishing Company, 1989
Buku Teks
Hitt, Michael A., author
Salemba Empat, 2002
Buku Teks
Burke, Ronald S.
McGraw - Hill , 1981
Buku Teks
Knudson, Harry R.
McGraw-Hill Kogakusha, 1979
Buku Teks
Steers, Richard M., author
Kent Publishing, 1985
Buku Teks