Dale, Nell, author
D.C. Heath And Co., 1987
Buku Teks
Dale, Nell, author
D.C. Heath And Co., 1987
Buku Teks
Fakultas Ilmu Komputer Universitas Indonesia, 1997
UI - Skripsi (Membership)
Southerton, Alan
John Wiley & Sons, 1994
Buku Referensi
Coffin, Stephen, author
Osborne/McGraw-Hill, 1990
Buku Teks