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Copyright (c) 2021 Luthfi Riadi, Achmad Febrianto, Saifuddin Saifuddin

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Creative Commons License
 
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.