United Nations Development Programme, Food and Agriculture Organization of the United Nations, & Marn, H. M. (1982). The Planning and design of the forest harvesting and log transport operation in the mixed dipterocarp forest of Sarawak: A technical report to the Government of Malaysia based on the work of Harald Mattsson Marn. Forest Dept..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations Development Programme, Food and Agriculture Organization of the United Nations, و Harald Mattsson Marn. The Planning and Design of the Forest Harvesting and Log Transport Operation in the Mixed Dipterocarp Forest of Sarawak: A Technical Report to the Government of Malaysia Based on the Work of Harald Mattsson Marn. Kuching: Forest Dept., 1982.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United Nations Development Programme, et al. The Planning and Design of the Forest Harvesting and Log Transport Operation in the Mixed Dipterocarp Forest of Sarawak: A Technical Report to the Government of Malaysia Based on the Work of Harald Mattsson Marn. Forest Dept., 1982.