1. Object oriented system analysis and design Ashrafi, Noushin, Harlow, Essex : Pearson Education Limited, [2014] ACCT360
2. Understanding your users: a practical guide to user research methods Baxter, Kathy, Amsterdam : Elsevier, Morgan Kaufmann, [2015] GDM516
3. Understanding your users: a practical guide to user research methods Baxter, Kathy, Amsterdam, Netherlands : Morgan Kaufmann, 2015. GDM516
