Refbacks
- There are currently no refbacks.
Sri Puji Lestari
Universitas Muhammadiyah Sumatera Utara
Dahrani Dahrani
Universitas Muhammadiyah Sumatera Utara
Nadia Ika Purnama
Universitas Muhammadiyah Sumatera Utara
Indonesia
Jufrizen Jufrizen
Universitas Muhammadiyah Sumatera Utara