Berry, D. 2000, The user experience - The iceberg analogy of usability. Technical library of the IBM Ease of Use Team. The user experienceArchiviato l'11 settembre 2017 in Internet Archive.
measuringu.com
Copia archiviata, su measuringu.com. URL consultato il 29 giugno 2020 (archiviato il 20 settembre 2018).
Berry, D. 2000, The user experience - The iceberg analogy of usability. Technical library of the IBM Ease of Use Team. The user experienceArchiviato l'11 settembre 2017 in Internet Archive.