Henry Manik, Rika Subarniati Triyoga, M. Fidel G. Siregar, R. Kintoko Rochadi, Etti Sudaryati. Force of Interaction as Intention of Maternal Behaviour in an Attempt to Decrease Maternal Mortality in Dairi District - Indonesia 2019 . IJAST [Internet]. 2020Jun.6 [cited 2024May6];29(04):4590 -460. Available from: http://sersc.org/journals/index.php/IJAST/article/view/24868