Kasmara, Dwi Pratiwi. “Knowledge Relation of Pregnant Women About Pregnancy Danger Signs With Antenatal Care Visits in Work Area of Hamparan-Perak’s Public Health Center”. JURNAL KESEHATAN POLTEKKES KEMENKES RI PANGKALPINANG, vol. 10, no. 1, June 2022, pp. 83-89, doi:10.32922/jkp.v10i1.436.