Husna, Putri Halimu, Kristiana Puji Purwandari, Siti Mawarni, Sri Sundari, Indah Kusuma Wardani, and Maryati Maryati. 2020. “The Effectiveness of Pregnant Women Class to Increase Knowledge and Hemoglobin Level”. Journal of Maternal and Child Health 5 (1):49-56. http://www.thejmch.com/index.php/thejmch/article/view/321.