Johnson, J. Keith
Manila The Asian Development Bank 1985,
Buku Teks
Trauner, Theodore J., author
John Wiley & Sons. Inc., 1993
Buku Teks
Dobson, Michael S., author
[American Management Association;;, ], 2012
eBooks
CQ Press, 2011
Buku Teks
Kemshall, Hazel, author
Home Office, 2001
Buku Teks