Gultom และ Ramotan. (1993) Parental socioeconomic and maternal behavioral factors that influence immunization coverage among children aged 18-23 months in Banjar district Indonesia. Mahidol University,:ม.ป.ท.Gultom และ Ramotan. 1993. Parental socioeconomic and maternal behavioral factors that influence immunization coverage among children aged 18-23 months in Banjar district Indonesia. ม.ป.ท.:Mahidol University,;Gultom และ Ramotan. Parental socioeconomic and maternal behavioral factors that influence immunization coverage among children aged 18-23 months in Banjar district Indonesia. ม.ป.ท.:Mahidol University, 1993. Print.