Afriyie, Samuel, Jianguo Duo, Kingsley Appiah, and Abdul-Aziz Ibn Musah. 2018. “The Nexus Between Types of Innovation and Marketing Performance of SME in an Emerging Economy”. International Review of Management and Marketing 8 (6):78-92. https://econjournals.net.tr/index.php/irmm/article/view/7042.