APA   Click to copy
Lucas, A. R., Levine, B. J., & Avis, N. E. (2017). Posttreatment trajectories of physical activity in breast cancer survivors. Cancer, 123, 2773–2780.

Chicago/Turabian   Click to copy
Lucas, Alexander R, Beverly J Levine, and Nancy E Avis. “Posttreatment Trajectories of Physical Activity in Breast Cancer Survivors.” Cancer 123 (2017): 2773–2780.

MLA   Click to copy
Lucas, Alexander R., et al. “Posttreatment Trajectories of Physical Activity in Breast Cancer Survivors.” Cancer, vol. 123, 2017, pp. 2773–80.

@article{lucas2017a,
  title = {Posttreatment trajectories of physical activity in breast cancer survivors},
  year = {2017},
  journal = {Cancer},
  pages = {2773--2780},
  volume = {123},
  author = {Lucas, Alexander R and Levine, Beverly J and Avis, Nancy E}
}