Yeni Suyati Thayib, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1982
UI - Skripsi Membership
Edi Djunaedi M.S., author
1989
UI - Skripsi Membership
Siregar, Fritz Edward, author
Universitas Indonesia, 2000
UI - Skripsi Membership
[publisher not identified], [date of publication not identified]
Naskah
Hasibuan, Zainal Arifin, author
Fakultas Ilmu Komputer Universitas Indonesia, 1996
UI - Laporan Penelitian