‘Yun Chang-man’ 작가의 책
Vocabulary Skills for the TOEFL iBT 2 : Step-up - Powerful Programs to Help Your High Scores
Yun Chang-man, Son Sung-Kyun (지은이)
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IELTS 급상승 Vocabulary - IELTS 기출어휘 60일 완성
James H. Lee, Yun Chang-man (지은이)
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Vocabulary Skills for the TOEFL iBT 3 : Finish-up - Powerful Programs to Help Your High Scores
Yun Chang-man, Son Sung-Kyun (지은이)
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Red TOEFL Voca
Yun Chang-man (지은이)
사회평론
TOEFL Pocket Book - 어휘의 달인이 되는 법
Yun Chang-man (지은이)
사람in
Vocabulary Skills for the TOEFL iBT 1 : Start-up - Powerful Programs to Help Your High Scores
Yun Chang-man, Son Sung-Kyun (지은이)
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Bansok IELTS Vocabulary - 기출어휘 60일 완성
James Kong, Yun Chang-man, Lee Sung-wan (지은이)
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Essential Guide for the New iBT TOEFL Vocabulary (교재 + MP3 CD 1장)
이석찬 (제임스 리), Yun Chang-man (지은이)
링구얼뱅크