Singh และ Khushmer. (1992) Knowledge, perception and child care practices by mothers of preschool children for acute respiratory infections in Sriprachan district, Suphanburi province, Thailand. Mahidol University,:ม.ป.ท.Singh และ Khushmer. 1992. Knowledge, perception and child care practices by mothers of preschool children for acute respiratory infections in Sriprachan district, Suphanburi province, Thailand. ม.ป.ท.:Mahidol University,;Singh และ Khushmer. Knowledge, perception and child care practices by mothers of preschool children for acute respiratory infections in Sriprachan district, Suphanburi province, Thailand. ม.ป.ท.:Mahidol University, 1992. Print.