APA   Click to copy
Santos, G., Howley, I. K., Copenhaver, B., & Aleven, V. (2009). Integrating Conceptual and Procedural Knowledge for Middle-school Math. Artificial Intelligence in Education, 787–788.

Chicago/Turabian   Click to copy
Santos, Gustavo, Iris K. Howley, Brad Copenhaver, and Vincent Aleven. “Integrating Conceptual and Procedural Knowledge for Middle-School Math.” Artificial Intelligence in Education (June 19, 2009): 787–788.

MLA   Click to copy
Santos, Gustavo, et al. “Integrating Conceptual and Procedural Knowledge for Middle-School Math.” Artificial Intelligence in Education, June 2009, pp. 787–88.

@article{gustavo2009a,
  title = {Integrating Conceptual and Procedural Knowledge for Middle-school Math},
  year = {2009},
  month = jun,
  day = {19},
  journal = {Artificial Intelligence in Education},
  pages = {787-788},
  author = {Santos, Gustavo and Howley, Iris K. and Copenhaver, Brad and Aleven, Vincent},
  booktitle = {aied},
  month_numeric = {6}
}