APA   Click to copy
Dey, A. K., Chu, H.-H., & Hayes, G. (2012). Proceedings of the 2012 ACM Conference on Ubiquitous Computing. Ubiquitous Computing.

Chicago/Turabian   Click to copy
Dey, Anind K., Hao-Hua Chu, and Gillian Hayes. “Proceedings of the 2012 ACM Conference on Ubiquitous Computing.” Ubiquitous Computing (August 4, 2012).

MLA   Click to copy
Dey, Anind K., et al. “Proceedings of the 2012 ACM Conference on Ubiquitous Computing.” Ubiquitous Computing, Aug. 2012.

@article{anind2012a,
  title = {Proceedings of the 2012 ACM Conference on Ubiquitous Computing},
  year = {2012},
  month = aug,
  day = {4},
  journal = {Ubiquitous Computing},
  author = {Dey, Anind K. and Chu, Hao-Hua and Hayes, Gillian},
  booktitle = {ubicomp},
  month_numeric = {8}
}