Simon, H. (1969). The Sciences of the Artificial (Third Edition.). Cambridge, Mass.: MIT Press. Retrieved from http://web.ebscohost.com.ezproxy.massey.ac.nz/ehost/ebookviewer/ebook/nlebk_49230_AN?sid=999cdba7-05fd-4a8a-a97b-89a1ae2aa7fe@sessionmgr104&vid=1&format=EB&rid=1 (Massey login required)