Damanik, Natalina http://orcid.org/0000-0003-0754-1670
Ong, Hwai Chyuan
Tong, Chong Wen
Mahlia, Teuku Meurah Indra
Silitonga, Arridina Susan
Funding for this research was provided by:
University of Malaya under University of Malaya under the SATU joint research scheme and BKP special (ST005-2017 and BKS054-2017)
postgraduate research grant (PG036-2014B)
Universiti Tenaga Nasional under the Fundamental Research Grant Scheme (UNIIG 2017 No. J510050691)
Politeknik Negeri Medan Research and Community Service Unit (PL5.2/PM/2018)
Article History
Received: 8 September 2017
Accepted: 20 April 2018
First Online: 2 May 2018