Johnston, Craig N., author
West, 2010
Buku Teks
Secretary of State forInformation and Tourism, 1973
Buku Teks
Yosua Kanata, author
Universitas Indonesia, 2016
UI - Skripsi (Membership)
Uhlenbeck, E. M. (Eugenius M.), author
Mouton, [date of publication not identified]
Buku Teks
Agus Umar, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2005
UI - Tesis (Membership)