Khannan, M.S.A. et al. 2021. New Product Development Method Trends and Future Research : A Systematic Literature Review. Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri. 23, 1 (May 2021), 11–24. DOI:https://doi.org/10.9744/jti.23.1.11-24.