Freeman, D. 1955. Report on the Iban of Sarawak: Vol. 1: Iban social organization. Kuching, Sarawak: Government Printing Office.
@book{freeman1955, address = {Kuching, Sarawak}, author = {Freeman, D.}, publisher = {Government Printing Office}, title = {Report on the Iban of Sarawak: Vol. 1: Iban social organization}, year = {1955} }