Eka NAM Sihombing

Eka NAM Sihombing Mail
https://scholar.google.com/citations?user=7V290XUAAAAJ&hl=id&oi=ao
(Scopus ID: 57216581577), Universitas Muhammadiyah Sumatera Utara, Indonesia

 [SINTA ID: 6127772]     [SCOPUS ID: 57216581577]