APA   Click to copy
Li, I., Dey, A. K., & Forlizzi, J. (2010). A stage-based model of personal informatics systems. Human Factors in Computing Systems, 557–566.

Chicago/Turabian   Click to copy
Li, Ian, Anind K. Dey, and Jodi Forlizzi. “A Stage-Based Model of Personal Informatics Systems.” Human Factors in Computing Systems (March 9, 2010): 557–566.

MLA   Click to copy
Li, Ian, et al. “A Stage-Based Model of Personal Informatics Systems.” Human Factors in Computing Systems, Mar. 2010, pp. 557–66.

@article{ian2010a,
  title = {A stage-based model of personal informatics systems},
  year = {2010},
  month = mar,
  day = {9},
  journal = {Human Factors in Computing Systems},
  pages = {557-566},
  author = {Li, Ian and Dey, Anind K. and Forlizzi, Jodi},
  booktitle = {chi},
  month_numeric = {3}
}