Charussri Leeyaphan และผู้แต่งคนอื่นๆ. (2008) Measuring melasma patients'quality of life using willingness to pay and time trade-off methods in Siriraj Hospital. Chulalongkorn University:ม.ป.ท.Charussri Leeyaphan และผู้แต่งคนอื่นๆ. 2008. Measuring melasma patients'quality of life using willingness to pay and time trade-off methods in Siriraj Hospital. ม.ป.ท.:Chulalongkorn University;Charussri Leeyaphan และผู้แต่งคนอื่นๆ. Measuring melasma patients'quality of life using willingness to pay and time trade-off methods in Siriraj Hospital. ม.ป.ท.:Chulalongkorn University, 2008. Print.