Ferguson, Margaretha, author
Leopold, 1977
Buku Teks
Bhagavan, N. V.
J. B. Lippincott Company, 1979
Buku Teks
Franssen, N.V.
Philips Technical Library, 1964
Buku Teks
Harry Muljadi, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1983
UI - Skripsi (Membership)
Indera, author
Universitas Indonesia, 1996
UI - Tesis (Membership)