Selvy Violita, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2009
UI - Tesis (Open)
Flenning, Peter
Megapoin, 1996
Buku Teks
Shin, Edysen, author
Alfa Cemerlang Edindo (AceLearnings), 2016
Buku Teks
Hartman, George M.
Gramedia Pustaka Utama, 1997
Buku Teks
Andi Rizaldi, author
1992
UI - Tesis (Membership)