Swipko chaemi innŭn Hanʼgugŏ munpŏp = 쉽고 재미 있는 한국어 문법 - Yi, Yang-hye; Yi, Tong-yŏn; Yi, Min-gyŏng kongjŏ (Sŏul-si : Language Plus, 2010)
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Keywords: Korean language -- Grammar -- Study and teaching -- Textbooks for foreign speakers