Najib Tun Razak, Datuk., author
Razak School of Govt. : Institut Terjemahan Negara Malaysia , 2011
Buku Teks
Bennis, Warren G., author
Intermedia, 1990
Buku Teks
Denny J.A., author
LKIS Yogyakarta, 2006
Buku Teks
Wibowo, author
RajaGrafindo Persada, 2012
Buku Teks
Wibowo, author
RajaGrafindo Persada, 2006
Buku Teks