Artikel Jurnal
Klooster, H.A.J., author
KITLV Press, 1997
Buku Teks
Beal, Edwin G., author
Library of Congress, 1950
Buku Teks
Stuart-Fox, David J., author
KITLV Press, 1992
Buku Referensi
Hall, Pauline Cook
Linguistic Society of America, 1956
Buku Referensi