Professor at Sejong University

School of Hospitality Business Management, Carson College of Business,Washington State …

Professor Emeritus, Univ. of Houston, Conrad N. Hilton College of Hotel and

Professor of Marketing, Deakin University, Melbourne, Australia

Professor at College of Hospitality & Tourism Management at Sejong University

Professor, School of Business and Law, Edith Cowan University

Purdue University

Distinguished Professor at Cornell University

Southern Taiwan University of Science and Technology

Nevsehir Hacı Bektas Veli University; Nevsehir HBV University; Nevsehir University