Luqman Khakim, Mustika Widowati, Iwan Hermawan, Eka Murtiasri and Winarto
The Social Sciences 11 ( 18 ): 4384 - 4387 , 2016
Iwan Hermawan, Sartono, N. Ghoniyah and Luqman Khakim
The Social Sciences 11 ( 18 ): 4378 - 4383 , 2016