Kandel และผู้แต่งคนอื่นๆ. (1999) Training and empowerment for pseudophakic motivator : a strategy to increase demand for cataract surgery. Chulalongkorn University:ม.ป.ท.Kandel และผู้แต่งคนอื่นๆ. 1999. Training and empowerment for pseudophakic motivator : a strategy to increase demand for cataract surgery. ม.ป.ท.:Chulalongkorn University;Kandel และผู้แต่งคนอื่นๆ. Training and empowerment for pseudophakic motivator : a strategy to increase demand for cataract surgery. ม.ป.ท.:Chulalongkorn University, 1999. Print.