https://www.tandfonline.com/doi/abs/10.2753/IJS0020-7659380103
https://www.emeraldinsight.com/doi/abs/10.1108/17542410810849132
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1468-5906.2010.01545.x
http://journals.sagepub.com/doi/abs/10.1177/0192513X16632266
단어가 없다고 개념이 없는 건 아니죠