Hani Khotijah Susilowati
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2010
UI - Tesis (Open)
Sinclair, Ian R.
Kuma Books, 1994
Buku Teks
Reynolds, Russel B.
Pa The Stackpole, 1966
Buku Teks
Peterson, Peronica Ronnie
Mosby , 2009
Buku Teks
Lonely planet, [date of publication not identified]
Buku Referensi