Morgan, Kay Summersby, author
Collins St Jame's Place, 1977
Buku Teks
Edell, Ron
Kensington publishing Corp., 1983
Buku Teks
Ministry of Foreign Affairs Republic of Indonesia, [1968]
Buku Teks
Theresia M. Adam, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1982
UI - Skripsi (Membership)
Murti Andriastuti, author
Program Pascasarjana Universitas Indonesia, 2003
UI - Tesis (Membership)