IBM, [date of publication not identified]
Buku Teks
Artikel Jurnal
Tuty Hendrawati, author
Fakultas Ilmu Komputer Universitas Indonesia, 2013
UI - Tugas Akhir
R.B. Parry, C.R. Perkins, editor
Library Association Publishing, 2001
Buku Teks
Ted Hughes, 1997
Buku Teks