(en) Steve Francis, "Fonua in Contemporary Tonga", in Thomas Reuter (éd.), Sharing the Earth, Dividing the Land: Territorial Categories and Institutions in the Austronesian World, Université nationale australienne, 2006, (ISBN1-920942-69-6)
George E. Marcus, "The nobility and the chiefly tradition in the modern Kingdom of Tonga", Journal of the Polynesian Society, supplément au vol.87, 1978, pp.36 & 41.