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Buku Teks
Robertson QC, Geoffrey, author
Penguin Books, 2000
Buku Teks
Allen, Judith A.
Oxford University Press, 1990
Buku Teks
Novira Isnainy Fahmi, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2018
UI - Tugas Akhir
Innes, Martin
Oxford Univesity Press, 2014
Buku Teks