Stuelz และ Andre. (1991) Pregnancy risk, relative economical household status and perception of the mother versus site of delivery in Prajinburi province. Mahidol University,:ม.ป.ท.Stuelz และ Andre. 1991. Pregnancy risk, relative economical household status and perception of the mother versus site of delivery in Prajinburi province. ม.ป.ท.:Mahidol University,;Stuelz และ Andre. Pregnancy risk, relative economical household status and perception of the mother versus site of delivery in Prajinburi province. ม.ป.ท.:Mahidol University, 1991. Print.