Swadling, P. (1973). The human settlement of the Arona Valley, Eastern Highland District, Papua New Guinea. Papua New Guinea Electricity Commission.
Chicago-referens (17:e uppl.)Swadling, Pamela. The Human Settlement of the Arona Valley, Eastern Highland District, Papua New Guinea. [Port Moresby]: Papua New Guinea Electricity Commission, 1973.
MLA-referens (9:e uppl.)Swadling, Pamela. The Human Settlement of the Arona Valley, Eastern Highland District, Papua New Guinea. Papua New Guinea Electricity Commission, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.