APA   Click to copy
Vowles, K. E., McCracken, L. M., & O’brien, J. Z. (2011). Acceptance and values-based action in chronic pain: a three-year follow-up analysis of treatment effectiveness and process. Behaviour Research and Therapy, 49, 748–755.

Chicago/Turabian   Click to copy
Vowles, Kevin E, Lance M McCracken, and Jane Zhao O’brien. “Acceptance and Values-Based Action in Chronic Pain: a Three-Year Follow-up Analysis of Treatment Effectiveness and Process.” Behaviour research and therapy 49 (2011): 748–755.

MLA   Click to copy
Vowles, Kevin E., et al. “Acceptance and Values-Based Action in Chronic Pain: a Three-Year Follow-up Analysis of Treatment Effectiveness and Process.” Behaviour Research and Therapy, vol. 49, Pergamon, 2011, pp. 748–55.

@article{vowles2011a,
  title = {Acceptance and values-based action in chronic pain: a three-year follow-up analysis of treatment effectiveness and process},
  year = {2011},
  journal = {Behaviour research and therapy},
  pages = {748--755},
  publisher = {Pergamon},
  volume = {49},
  author = {Vowles, Kevin E and McCracken, Lance M and O’brien, Jane Zhao}
}