Ingo-Eric M.
London : k.C. Saur Munchen, 1981,
Buku Referensi
Das, Bhagirath Lal
Zed Books, 1999
Buku Teks
Inggita Prasasya Swasti, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Tesis (Membership)
Fatma Muthia Kinanti, author
Universitas Indonesia, 2015
UI - Tesis (Membership)
London, 2004
Buku Teks