M. . Purnadianti, N. Ermawati, and R. N. . Berlian, “Comparison of Smoking Habits and Coffee Consumption In Adolescents Against Hemoglobin Levels In Mojoroto Kediri City: Perbandingan Kebiasaan Merokok dan Mengkonsumsi Kopi Pada Remaja Terhadap Kadar Hemoglobin Di Mojoroto Kota Kediri”, medicra, vol. 4, no. 1, pp. 35–40, Aug. 2021.