Suradi, R., Jatiputra, S., Tan, A., Wiknjosastro, G., & Tarigan, L. (1999). Effect of lactation management training on feeding pattern from birth to 6 months of age. Paediatrica Indonesiana, 39(5-6), 117-26. https://doi.org/10.14238/pi39.5-6.1999.117-26