APA   Click to copy
Luka, S., Hastings, L., Amdur, R., Vaziri, K., & Lin, P. (2013). The effect of body mass index and tumor size on conversion from laparoscopic to open hepatic resection.

Chicago/Turabian   Click to copy
Luka, Samuel, L. Hastings, R. Amdur, K. Vaziri, and P. Lin. “The Effect of Body Mass Index and Tumor Size on Conversion from Laparoscopic to Open Hepatic Resection” (2013).

MLA   Click to copy
Luka, Samuel, et al. The Effect of Body Mass Index and Tumor Size on Conversion from Laparoscopic to Open Hepatic Resection. 2013.

@article{samuel2013a,
  title = {The effect of body mass index and tumor size on conversion from laparoscopic to open hepatic resection},
  year = {2013},
  author = {Luka, Samuel and Hastings, L. and Amdur, R. and Vaziri, K. and Lin, P.}
}