Mayasari Putri Ardela, et al. “The Effect of Red Guava (Psidium Guajava l.) Juice on Hemoglobin Levels During Menstruation in Adolescent Girls”. Journal of Global Research in Public Health, vol. 8, no. 1, June 2023, pp. 21-25, doi:10.30994/jgrph.v8i1.428.