Church, Jeffrey
McGraw-Hill, 2000
Buku Teks
Gilley, Jerry W
Perseus Books, 2000
Buku Teks
edited by Noel Entwistle
Routledge, 1990
Buku Referensi
Bennis, Warren G.
Addison-Wesley, [Date of publication not identified]
Buku Teks
Burke, W. Warner
Addison-Wesley, 1987
Buku Teks