APA (7th ed.) Citation

Brown, M., Sharples, S., & Harding, J. (2013). Introducing PEGI: A usability process for the practical evaluation of Geographic Information. Elsevier.

Chicago Style (17th ed.) Citation

Brown, Michael, Sarah Sharples, and Jenny Harding. Introducing PEGI: A Usability Process for the Practical Evaluation of Geographic Information. Elsevier, 2013.

MLA (9th ed.) Citation

Brown, Michael, et al. Introducing PEGI: A Usability Process for the Practical Evaluation of Geographic Information. Elsevier, 2013.