Analisis Faktor - Faktor Yang Mempengaruhi Keputusan Ibu Hamil Memilih Pelayanan Antenatal Care (ANC) di Poliklinik Kebidanan dan Penyakit Kandungan Rumah Sakit Umum Daerah Kota Semarang (Analysis of Factors That Influence the Decision of Pregnant Women in Choosing Antenatal Care Services at the Polyclinic of the Midwifery and the Obstetrical Disease at Semarang Hospital) - Siswosuharjo, Suwignyo (2004)