Ismawanti, Z., J. Suparyatmo, and B. Wiboworini. “The Comparative Effect of Red Guava (Psidium Guajava. L.) With Papaya (Carica Papaya) on Blood Glucose Level of Type 2-Diabetic Patients”. Romanian Journal of Diabetes Nutrition and Metabolic Diseases, Vol. 27, no. 3, Sept. 2020, pp. 209-13, http://www.rjdnmd.org/index.php/RJDNMD/article/view/741.