Tullis, Tom <br/><br/>
Measuring the user experience :  collecting, analyzing, and presenting usability metrics / 
Tom Tullis, Bill Albert 
 - 2nd ed. 
 - Amsterdan :  Morgan Kaufmann,  c2013 
 - xvii, 301 p. :  col. ill. ;  24 cm. 
<br/><br/>Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>9780124157811 
<br/><br/><label>Subjects--Topical Terms: </label><br/>User interfaces (Computer systems)--Measurement<br/>User interfaces (Computer systems)--Evaluation<br/>Technology assessment