Sinaga, M.; Mohamad, N. A.; Sinaga, S. N.; Sinuhaji, L. N.; Manik, R. Y.; Girsang, H. The Relationship Between Mother’s Knowledge And Exclusive Breast Feeding In The Work Area Of Bingai Public Health Center, Wampu District Langkat Regency. Jurnal EduHealth 2021, 11, 106-110.