Shaikh, Abdul Samad, and Mustaghis ur Rahman. “Consumer Perceptions of Green Products: A Survey of Karachi”. JISR management and social sciences & economics 9, no. 2 (December 31, 2011): 15–29. Accessed May 6, 2024. https://jisrmsse.szabist.edu.pk/index.php/szabist/article/view/233.