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Buku Teks
edited by Ulrich Ammon, Norbert Dittmar, Klaus J. Mattheier
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Buku Referensi
edited by Ulrich Ammon, Norbert Dittmar, Klaus J. Mattheier
Walter de Gruyter, 1988
Buku Referensi
Rr. Shinta D. Yahya, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Chambers, J.K., author
Wiley-Blackwell, 2009
Buku Teks