APA   Click to copy
Chai, N., Scher, A., Moghekar, A., Bond, D., & Peterlin, B. (2014). Obesity and Headache: Part I – A Systematic Review of the Epidemiology of Obesity and Headache. Headache.

Chicago/Turabian   Click to copy
Chai, N., A. Scher, A. Moghekar, D. Bond, and B. Peterlin. “Obesity and Headache: Part I – A Systematic Review of the Epidemiology of Obesity and Headache.” Headache (2014).

MLA   Click to copy
Chai, N., et al. “Obesity and Headache: Part I – A Systematic Review of the Epidemiology of Obesity and Headache.” Headache, 2014.

@article{n2014a,
  title = {Obesity and Headache: Part I – A Systematic Review of the Epidemiology of Obesity and Headache},
  year = {2014},
  journal = {Headache},
  author = {Chai, N. and Scher, A. and Moghekar, A. and Bond, D. and Peterlin, B.}
}