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Wissenschaftliche Buchgesellschaft , 1999
Buku Teks SO
Mol, Hendrik, 1919-1981
Mouton, 1963
Buku Teks
Mol, Hendrik, 1919-1981
Mouton, 1970
Buku Teks
Heffner, R.M.S.
University of Wisconsin Press, 1960
Buku Teks
Ladefoged, Peter
Blackwell publisher, 2001
Buku Teks