Butarbutar, Anjani, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2019
UI - Tugas Akhir
Hand, D.J., author
John Wiley & Sons, 1981
Buku Teks
Fredman, Sandra, author
Oxford University Press, 2011
Buku Teks
edited by Craig Donnellan
Independence Educational, 1995
Buku Teks
Talitha Nabila, author
2018
UI - Skripsi (Membership)