Hudson, Richard
Basic Blackwell , 1984
Buku Teks
Laski, Harold J.
George Allen and Unwin, 1955
Buku Teks
Laski, Harold J.
George Allen and Unwin, 1957
Buku Teks
Healy, Phyllis M.
The Institute of Nationale Language and The Summer Institute Linguistics, 1960
Buku Teks
Makkink, H.J.
Nijgh and Van Ditmar, 1951
Buku Teks