Gaya APA

PURWANINGSIH, E. et al (2015). Ethanolic periwinkle leaf extract reduces telomerase expression in T47D cancer cells . Jakarta: Medical Faculty, Trisakti University.

Gaya MLA

PURWANINGSIH, Endang. et al. "Ethanolic periwinkle leaf extract reduces telomerase expression in T47D cancer cells". Jakarta: Medical Faculty, Trisakti University, 2015. Artikel.