B, Christian, Daniel Sampepajung, Prihantono Prihantono, Berti Nelwan, and Burhanuddin Bahar. 2016. “Relation Expression of Eestrogen Reseptor and Ki67 in Invasive Ductal Carcinoma Breast Cancer”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 30 (5):106-13. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6680.