How a Lone Inventor and an Unknown Company Created the Biggest Communication Breakthrough Since Gutenberg - - Chester Carlson Birth of the Xerox Simon and Schuster উদ্ধৃতি টেমপ্লেট ইংরেজি প্যারামিটার ব্যবহার করেছে ( link
How a Lone Inventor and an Unknown Company Created the Biggest Communication Breakthrough Since Gutenberg - - Chester Carlson and the Birth of Xerox ( Simon and Schuster 2005