Ratnalela, I. (2019) “Pemeriksaan Kadar Haemoglobin Pada Ibu Hamil Trimester IIIdi Klinik Sally Medan Tahun 2013”, Jurnal Ilmiah PANNMED (Pharmacist, Analyst, Nurse, Nutrition, Midwivery, Environment, Dentist), 8(1), pp. 31–35. doi: 10.36911/pannmed.v8i1.465.