Millstone, Erik, author
Penguin Books, 1986
Buku Teks
Board of Investment Welfare, 1994
Buku Teks
Dadi Hidayat Maskar, author
Fakultas Kedokteran Universitas Indonesia, 2004
UI - Tesis (Membership)
Benarde, Melvin A.
McGraw-Hill Book, 1971
Buku Teks
compiled by Michael and Irene Ash
Gower, 1995
Buku Referensi