@misc{Jung_Sungwook_Training_2019,
 author={Jung, Sungwook and Park, Jusik and Johnson, John Arthur},
 type={artykuł},
 publisher={Projack},
 title={Training effects of Dahn Taekwondo’s Spondylitis Improvement Program on ankylosing spondylitis: a case study},
 address={Częstochowa},
 year={2019},
 language={eng},
}