Freeman, D. (1955). Iban agriculture: A report on the shifting cultivation of hill rice by the Iban of Sarawak. H. M. Stationery Office.
Chicago-viite (17. p.)Freeman, Derek. Iban Agriculture: A Report on the Shifting Cultivation of Hill Rice by the Iban of Sarawak. London: H. M. Stationery Office, 1955.
MLA-viite (9. p.)Freeman, Derek. Iban Agriculture: A Report on the Shifting Cultivation of Hill Rice by the Iban of Sarawak. H. M. Stationery Office, 1955.
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