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Cengage-Wadsworth, 2014
Buku Teks
Ingrid Volkmer, editor
[Wiley-Blackwell, ], 2012
eBooks
Grace Fika Hanna, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2016
UI - Makalah dan Kertas Kerja
Stokes, Jane, author
Sage Publications , 2003
Buku Teks
Sparks, Glenn Grayson, author
Cengage Learning, 2016
Buku Teks