Bhinadi, Ardito, and Ardithama Sumarli. “The Readiness of Business Practitioners in Special District of Yogyakarta in Facing the Operation of New Yogyakarta International Airport 2019”. International Journal of Economics and Financial Issues, vol. 9, no. 5, Sept. 2019, pp. 90-93, https://mail.econjournals.com/index.php/ijefi/article/view/8412.