R. Wulandari, Ramadhani Nainggolan, Riska Yanti Harahap, and Ica Fauziah Harahap, “The Effectiveness of Oxytoxin Massage Towards Increasing Breast Milk Production in Aek Haruaya Village, Portibi District”, Int Jou of PHE, vol. 1, no. 2, pp. 174–178, May 2022.