Wulandari, Annisaa, and Hasbullah Hasbullah. “Analisis Kelayakan Investasi Perusahaan Industri Jasa Freight Forwarding Menggunakan Ekonomi Teknik”. Proceeding Mercu Buana Conference on Industrial Engineering, vol. 3, no. 1, June 2021, pp. 180-6, https://publikasi.mercubuana.ac.id/index.php/mbcie/article/view/27651.