Sadatov Chori Xolmurodovich, and Qudratov Javli Xolbozorovich. “THEORETICAL FUNDAMENTALS OF STUDY PEN AND GENERAL PRINCIPLES OF DRAWING”. Galaxy International Interdisciplinary Research Journal 9, no. 10 (October 29, 2021): 709–716. Accessed November 26, 2024. https://giirj.com/index.php/giirj/article/view/426.