Erdoğan, N., ve T. Albustanlıoğlu. “Sustainable Tourism Development: Exploring the Relationship of Travel Agents’ Education and Experience to Their Attitudes on Environmental Issues”. İşletme Araştırmaları Dergisi, c. 5, sy 2, Haziran 2021, ss. 105-22, https://isarder.org/index.php/isarder/article/view/112.