Meliala, Djaja Sembiring, author
Tarsito, 1979
Buku Teks
Dara Aisyah, author
[Geografia Online, ], 2010
Artikel Jurnal
Koes Irianto, author
Alfabeta, 2014
Buku Teks
Hariman Satria, author
2016
UI - Tesis (Membership)
Mawengkang, William Eiffel, author
Fakultas Ilmu Administrasi Universitas Indonesia, 2011
UI - Skripsi (Open)