자료출처)
▶유튜브-다큐3일 예고편
https://www.youtube.com/watch?v=605pOnrms4w
▶ KBS 다큐3일
https://vod.kbs.co.kr/index.html?source=episode&sname=vod&stype=vod&program_code=T2007-0188&program_id=PS-2021175109-01-000&broadcast_complete_yn=&local_station_code=00§ion_code=05