सिं Sing अशोकमान Ashokman. “उत्पादकीय वस्तुको डिजाइन [Design of Productive Goods]”. SIRJANĀ – A Journal Of Arts and Art Education 5, no. 1 (December 1, 2018): 82–87. Accessed April 27, 2025. https://nepjol.info./index.php/sirjana/article/view/39776.