Cuti Haid Jangan Dibuat Iri, Apalagi Lupa Diri

4.https://www.healthline.com/health/premenstrual-syndrome

5.https://youngwomenshealth.org/2013/08/22/painful-periods/

6.https://id.wikihow.com/Menurunkan-Prostaglandin-Secara-Alami-dengan-Makanan

7.https://www.menstruationresearch.org/2010/06/30/the-menstruation-machine/