Universitas Indonesia, 2008
UI - Tugas Akhir
Cuito, Aurora
Loft Publications S.L and HBI, 2002
Buku Teks
Buku Teks
Encarna Castillo, editor
Harper Design International, 2003
Buku Referensi
Stanyukovich, K.
Foreign Languages Publishing, [date of publication not identified]
Buku Teks