The University of Sydney, 1958
Buku Teks
Hirahara, Naomi
Bantam Dell, 2004
Buku Teks
Tokyo, the Jepan Institute of Labour
Majalah, Jurnal, Buletin
Brett, Richard
[Port Moresby : Department of Information and Extension Services and the] Summer Institute of Linguistics, 1962
Buku Klasik
Subrarayappa, B.V.
Tata McGraw-Hill, 1992
Buku Teks