The scientific article (2556 (2013)) "guest book signature history Steve Jobs (Steve chop". Online). Accessed from http:.//www.neutron.rmutphysics.com/. (search date June 26 2559)
scientific articles Sign Guest Book (2556), "History of Steve Jobs Steve Jobs". (Online). Access from. Http://www.neutron.rmutphysics.com/. (Searched on June 26, 2559).
Science article, sign the guestbook (2556.) "history, Steve Jobs Steve Jobs". (online).Accessed from. Http: / / www.neutron.rmutphysics.com /. (date search 26 June 2559).