सिं Sing अA. उत्पादकीय वस्तुको डिजाइन [Design of Productive Goods]. SIRJANĀ - J Arts & Art Educ. [Internet]. 2018 Dec. 1 [cited 2025 Dec. 8];5(1):82-7. Available from: https://www.nepjol.info/index.php/sirjana/article/view/39776