Ali, M., Saputra, I., Adillida, A., Sofyani, S. and Lubis, I. (2016) “Knowledge, attitude, and practice of working and non-working mothers concerning immunization of underfive children”, Paediatrica Indonesiana, 44(3), pp. 101-5. doi: 10.14238/pi44.3.2004.101-5.