APA   Click to copy
Lill, J. T., Marquis, R. J., & Ricklefs, R. E. (2002). Host plants influence parasitism of forest caterpillars. Nature, 417, 170–173.

Chicago/Turabian   Click to copy
Lill, JT, RJ Marquis, and RE Ricklefs. “Host Plants Influence Parasitism of Forest Caterpillars.” Nature 417 (2002): 170–173.

MLA   Click to copy
Lill, J. T., et al. “Host Plants Influence Parasitism of Forest Caterpillars.” Nature, vol. 417, Nature Publishing Group UK London, 2002, pp. 170–73.

@article{lill2002a,
  title = {Host plants influence parasitism of forest caterpillars},
  year = {2002},
  journal = {Nature},
  pages = {170--173},
  publisher = {Nature Publishing Group UK London},
  volume = {417},
  author = {Lill, JT and Marquis, RJ and Ricklefs, RE}
}