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2. Human Factors InternationalïŒ2001ïŒã ããã€ãã®ã¯ã©ã€ã¢ã³ããšã¯ã¹ããªãšã³ã¹ã 2001幎10æ10æ¥ã httpïŒ//www.humanfactors.com/about/finance.aspããååŸã
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4. Rhodes John S.ïŒ2000ïŒã ãŠãŒã¶ããªãã£ã¯ããªãã®äŒç€Ÿãæãããšãã§ããŸãã 2001幎10æ10æ¥ã«http://www.webword.com/moving/savecompany.htmlããååŸã
5. Jakob Nielsenã®Alertboxã2000幎3æ19æ¥ïŒ5人ã®ãŠãŒã¶ãŒã§ãã¹ãããã ãã§ããçç±ã http ïŒ//www.useit.com/alertbox/20000319.html
6.ã¹ã³ããã»ã¯ã€ã¹ã ãã³ããã«ããŠãŒã¶ããªãã£ã John WileyïŒSons Ltdã2002ãpã 180ã