Grudin, Jonathan (2005). "Three faces of human-computer interaction". IEEE Annals of the History of Computing. 27 (4): 46–62. doi:10.1109/mahc.2005.67. S2CID2690893.
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Grudin, Jonathan (2005). "Three faces of human-computer interaction". IEEE Annals of the History of Computing. 27 (4): 46–62. doi:10.1109/mahc.2005.67. S2CID2690893.