"A4000 User's Guide"(PDF) (به انگلیسی). Commodore Electronics Limited. ۱۹۹۲. Archived from the original(PDF) on 13 June 2012. Retrieved 23 February 2016.
"A4000 User's Guide"(PDF) (به انگلیسی). Commodore Electronics Limited. ۱۹۹۲. Archived from the original(PDF) on 13 June 2012. Retrieved 23 February 2016.