Silaban, Agust Hendra, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Skripsi (Membership)
Siallagan, Benny Parlaungan, author
Gramedia Pustaka Utama, 2003
Buku Teks
Ruth Octorina Kantate, author
2007
UI - Tesis (Membership)
Djoni Rombe, author
2007
UI - Tesis (Membership)
Ibrahim, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2002
UI - Tesis (Membership)