APA   Click to copy
Li, I., Dey, A. K., & Forlizzi, J. (2009). Grafitter: leveraging social media for self reflection. ACM Crossroads Student Magazine, 16(2), 12–13.

Chicago/Turabian   Click to copy
Li, Ian, Anind K. Dey, and Jodi Forlizzi. “Grafitter: Leveraging Social Media for Self Reflection.” ACM Crossroads Student Magazine 16, no. 2 (October 30, 2009): 12–13.

MLA   Click to copy
Li, Ian, et al. “Grafitter: Leveraging Social Media for Self Reflection.” ACM Crossroads Student Magazine, vol. 16, no. 2, Oct. 2009, pp. 12–13.

@article{ian2009a,
  title = {Grafitter: leveraging social media for self reflection},
  year = {2009},
  month = oct,
  day = {30},
  issue = {2},
  journal = {ACM Crossroads Student Magazine},
  pages = {12-13},
  volume = {16},
  author = {Li, Ian and Dey, Anind K. and Forlizzi, Jodi},
  month_numeric = {10}
}