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Ziv Yaar User is Always Right, The: A Practical Guide to Creating and Using Personas for the Web

Donald A. Norman The Design of Everyday Things

Dieter Rams - Wikipedia

Don Norman Emotional Design: Why We Love (or Hate) Everyday Things

Weinschenk Susan 100 Things Every Designer Needs to Know About People (Voices That Matter)

Chris Goward You Should Test That: Conversion Optimization for More Leads, Sales and Profit or The Art and Science of Optimized Marketing