Silaen, M., E. Yerizel, S. Syukur, and E. Purwati. “The Effect of Giving Halal Curd to Pregnant Woman for 10 Days”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 33, no. 1, July 2017, pp. 188-95, https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3154.