Silitonga, Putri Elita, Yetti Meuthia Hasibuan, and Denny Walady Utama. “Snack Food Packaging Design Design (Chocolate) Using the Theory of Inventive Problem Solving (TRIZ) Method at UKM Himasweets Tembung”. IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) 2, no. 3 (December 26, 2023): 1–4. Accessed July 7, 2025. https://e-journals.irapublishing.com/index.php/IRAJTMA/article/view/56.