Bendu และผู้แต่งคนอื่นๆ. (2019) The responsibility, ethics and accountability of diamond and gold companies for work performance in Sierra Leone. Rajamangala University of Technology Krungthep:ม.ป.ท.Bendu และผู้แต่งคนอื่นๆ. 2019. The responsibility, ethics and accountability of diamond and gold companies for work performance in Sierra Leone. ม.ป.ท.:Rajamangala University of Technology Krungthep;Bendu และผู้แต่งคนอื่นๆ. The responsibility, ethics and accountability of diamond and gold companies for work performance in Sierra Leone. ม.ป.ท.:Rajamangala University of Technology Krungthep, 2019. Print.