APA   Click to copy
Luwang, T., Wang, M., & Li, W.-S. (2013). Time and location based delivery optimization.

Chicago/Turabian   Click to copy
Luwang, Tianyu, Mengjiao Wang, and Wen-Syan Li. “Time and Location Based Delivery Optimization” (October 9, 2013).

MLA   Click to copy
Luwang, Tianyu, et al. Time and Location Based Delivery Optimization. Oct. 2013.

@article{tianyu2013a,
  title = {Time and location based delivery optimization},
  year = {2013},
  month = oct,
  day = {9},
  author = {Luwang, Tianyu and Wang, Mengjiao and Li, Wen-Syan},
  month_numeric = {10}
}