Adityanti, Rinata, and Ali Mulyawan. “Aplikasi Perhitungan PPn Atas Jasa Pihak Ketiga”. Jurnal Computech & Bisnis (e-Journal), vol. 9, no. 2, Dec. 2015, pp. 73-83, http://jurnal.stmik-mi.ac.id/jcb/article/view/157.