Pawin Puapornpong และผู้แต่งคนอื่นๆ. (2008) The Prevalence of Group B Streptococcus in First and Third Trimester Pregnancy. <i>Journal of Medicine and Health Sciences</i>, <i>15</i>(1), 22-26.Pawin Puapornpong และผู้แต่งคนอื่นๆ. "The Prevalence of Group B Streptococcus in First and Third Trimester Pregnancy". Journal of Medicine and Health Sciences 15 (2008):22-26.Pawin Puapornpong และผู้แต่งคนอื่นๆ. The Prevalence of Group B Streptococcus in First and Third Trimester Pregnancy. Faculty of Medicine,Srinakharinwirot University:ม.ป.ท. 2008.