Maqin, R. A., and N. Hendri. “Comparative Analysis: The Effect of Macro and Micro Environment on Marketing Strategy and Marketing Performance of Small Medium Enterprises (Survey on Group of Small Medium Enterprises of Food and Non-Food Products in Cianjur Regency, West Java, Indonesia”. International Review of Management and Marketing, vol. 7, no. 5, Dec. 2017, pp. 70-76, https://econjournals.com/index.php/irmm/article/view/5673.