Sopia, Lela, and Tuti Yanuarti. 2022. “Differences in Knowledge of Preconceptional Mothers about Breast Examination (Breaking) As Pre-and-Post Explanation Breast Cancer Prevention”. Jurnal Keperawatan Komprehensif (Comprehensive Nursing Journal) 8 (Special Edition). http://journal.stikep-ppnijabar.ac.id/index.php/jkk/article/view/392.