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Moore Publishing, 1982
Buku Teks
Barlow, I.M., author
Research Studies Press, 1981
Buku Teks
edited by: John Halligan and Chris Paris
Longman Chesire, 1984
Buku Teks
Miftah Fadhli, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2015
UI - Skripsi (Membership)
Saltzstein, Alan L., author
Wadsworth/Thomson learning, 2003
Buku Teks