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Buku Teks
Furseth, Inger
Sage, 2013
Buku Teks
Watson, George
Longman, 1987
Buku Teks
Davis, Gordon B.
Barron's Educational Series, 1979
Buku Teks
Dian Masniari
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi Membership