Thomson, George F., author
Institute of Personeel Management, 1975
Buku Teks
DuBrin, Andrew J., author
Pergamon Press, 1972
Buku Teks
Stettner, Morey, author
McGraw-Hill, 2003
Buku Teks
Bennet, C.L.
New York, American Management Ass.,
Buku Teks
Blake, Robert R.
Gulf Pub. Co., Book Division, 1978
Buku Teks