Siregar, Julio Elia, author
Universitas Indonesia, 2015
UI - Skripsi (Membership)
Routledge, 1993
Buku Teks
Nusyirwan Rizqi, author
Fakultas Teknik Universitas Indonesia, 2006
UI - Tesis (Membership)
edited by Richard Ronald and Marja Elsinga
Routledge, 2012
Buku Teks
Universitas Indonesia, 2009
UI - Skripsi (Open)