Somying Ngamurulert. (1999) Detection of Chlamydia pneumoniae in chronic obstructive pulmonary disease with acute respiratory illness. Mahidol University,:ม.ป.ท.Somying Ngamurulert. 1999. Detection of Chlamydia pneumoniae in chronic obstructive pulmonary disease with acute respiratory illness. ม.ป.ท.:Mahidol University,;Somying Ngamurulert. Detection of Chlamydia pneumoniae in chronic obstructive pulmonary disease with acute respiratory illness. ม.ป.ท.:Mahidol University, 1999. Print.