↑ 2,02,12,22,32,42,52,62,72,8Dorney, Sean:Papua New Guinea: people, politics and history since 1975. Publikigita da ABC Books. Dato di publikigo: 2001.
↑ 3,03,13,23,33,43,5May, R.J.:State and society in Papua New Guinea: the first twenty five years. Publikigita da Crawford House Publishing. Dato di publikigo: 2001.