Akhtar, Sana, Aiman Riaz, Faiza Noor, Umaima Zainab, and Faryal Asim. “The Willingness of Residents to Pay for Improving Air Quality”. Indonesian Journal of Innovation and Applied Sciences (IJIAS) 1, no. 2 (June 16, 2021): 144-150. Accessed April 26, 2024. https://ojs.literacyinstitute.org/index.php/ijias/article/view/272.