Nurimbetov Timur Uzakbergenovich, et al. “Use of Marketing Methods in the Development of Strategies for Diversification of Agricultural Production in the Republic of Karakalpakstan”. Global Journal of Human-Social Science, vol. 20, no. E8, May 2020, pp. 11-15, https://socialscienceresearch.org/index.php/GJHSS/article/view/3444.