Siregar, I. W., author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, [Date of publication not identified]
UI - Skripsi (Membership)
Pangalila, Joseph, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1991
UI - Tesis (Membership)
Walhi, 1993
Buku Teks
Sebayang, Dinas, author
Fakultas Teknik Universitas Indonesia, 1991
UI - Skripsi (Membership)
Muhammad Nashihin, author
1995
UI - Tesis (Membership)