Lazar, Feng og Hochheiser: Research Methods in HCI, 2010. Wiley. ISBN: 978-0-470-72337-1.
Tøftoy-Andersen og Wold: Praktisk bruker-testing, 2011. Cappelen Damm Akademisk. ISBN: 978-82-02-34350-7. This book in not required, but can be helpful with practical preparations for user testing. It is available in Norwegian only.
Optional (for children's museum and school museum) references:
Culén, Alma Leora, Tone Bratteteig, Sumit Pandey, and Swati Srivastava. “Child-to-child (C2C): Design of Interactive 3D Book Space for Children´s Museum.” IADIS conference on Interfaces in Human computer Interaction, 2013.