Clifford, W. (1984). Law and order in Papua New Guinea. Institute of National Affairs.
Lua i Stíl Chicago (17ú heag.)Clifford, William. Law and Order in Papua New Guinea. Papua New Guinea: Institute of National Affairs, 1984.
Lua MLA (9ú heag.)Clifford, William. Law and Order in Papua New Guinea. Institute of National Affairs, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.