著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI)
LIEBERMAN E,Changes in fetal position during labor and their association with epidural analgesia,Obstet Gynecol,,,2005,105,,974-982,https://cir.nii.ac.jp/crid/1571980075661803264,