TARIGAN, RICA, NASUTION, M. PANDAPOTAN, AND WIDJAJA, SRY. " The Activities of Antifertility Ethanol Extract Guava Leaves (Psidium Guajava L.) based on The Analysis Of Cement and Display of Immunohistochemistry Cyclooxygenase-2 In Testis Of Mice (Mus Musculus L.)" JURNAL ILMU KEFARMASIAN INDONESIA [Online], Volume 14 Number 2 (4 September 2017)