Arini, N.R., Gilang Muhammad, Joke Pratilastiarso and Setyo Nugroho 2022. Numerical Study of a Wind Turbine Blade Modification Using 30° Angle Winglet on Clark Y Foil . EMITTER International Journal of Engineering Technology. 10, 2 (Dec. 2022), 311-319. DOI:https://doi.org/10.24003/emitter.v10i2.680.