Cook, D. (2006). Traditional taekwondo: Core techniques, history, and philosophy. YMAA Publication Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCook, Doug. Traditional Taekwondo: Core Techniques, History, and Philosophy. Wolfeboro, NH: YMAA Publication Center, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCook, Doug. Traditional Taekwondo: Core Techniques, History, and Philosophy. YMAA Publication Center, 2006.
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