Carlson, Ronald L., author
Anderson, 1970
Buku Teks
Brett, Richard
Port Moresby : The Summer Istitute of Linguistic, 1961.
Buku Teks
Kenney, John Paul, author
Thomas, [1959]
Buku Teks
he Institute for Training in Municipal Administration by the International City Managers’ Association , 1954
Buku Teks
Jack Kitaeff, editor
Routledge, 2011
Buku Teks