Artikel Jurnal
Hafizh Mulia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2019
UI - Tugas Akhir
edited by Thomas and Dorothy Wilson
Longman, 1991
Buku Teks
Gough, Ian, author
Macmillan, 1992
Buku Teks
Lee, Phil, author
Sage, 1980
Buku Teks