APA   Click to copy
Li, I., Dey, A. K., Forlizzi, J., Höök, K., & Medynskiy, Y. (2011). Personal informatics and HCI: design, theory, and social implications. Human Factors in Computing Systems, 2417–2420.

Chicago/Turabian   Click to copy
Li, Ian, Anind K. Dey, Jodi Forlizzi, Kristina Höök, and Yevgeniy Medynskiy. “Personal Informatics and HCI: Design, Theory, and Social Implications.” Human Factors in Computing Systems (April 6, 2011): 2417–2420.

MLA   Click to copy
Li, Ian, et al. “Personal Informatics and HCI: Design, Theory, and Social Implications.” Human Factors in Computing Systems, Apr. 2011, pp. 2417–20.

@article{ian2011a,
  title = {Personal informatics and HCI: design, theory, and social implications},
  year = {2011},
  month = apr,
  day = {6},
  journal = {Human Factors in Computing Systems},
  pages = {2417-2420},
  author = {Li, Ian and Dey, Anind K. and Forlizzi, Jodi and Höök, Kristina and Medynskiy, Yevgeniy},
  booktitle = {chi},
  month_numeric = {4}
}