Widyastuti, Tri, 		Bisri, Bisri, AND 		Suhardi, Suhardi.
" PERILAKU ASERTIF  DALAM MENINGKATKAN PRESTASI KERJA  KONSULTAN MULTI LEVEL MARKETING" <em>CERMIN: Jurnal Penelitian</em> [Online], Volume 4 Number 1 (1 July 2020)