1. Iryougenba ni KYT wo toriireru. Kanjyaanzensuisin journal. 2007; no. 16 (in Japanese).
2. Japan industrial safety & health association edited. Handbook for leader of zero-accident total participation campaign 2002, 2003. Japan industrial safety & health association (in Japanese).
3. Japan automobile federation web site http://www.jaf.or.jp/eco-safety/safety/danger/ (2016). (Accessed 11 Mar 2016). (in Japanese).
4. Honda web site http://www.honda.co.jp/safetyinfo/kyt/training/ (2016). (Accessed 11 Mar 2016). (in Japanese).
5. Zenkoku kodomokai rengoukai web site http://www.kodomo-kai.or.jp/kyt/ . (2016). (Accessed 11 Mar 2016). (in Japanese).