Cetin, Ibrahim, ve Alamir N. Al-Alawi. “ECONOMIC DIVERSITY AND CONTRIBUTION OF TOURISM TO OMAN ECONOMY”. Uluslararası Turizm, Ekonomi Ve İşletme Bilimleri Dergisi (IJTEBS), c. 2, sy 2, Ağustos 2019, ss. 444-9, https://www.ijtebs.org/index.php/ijtebs/article/view/274.