APA   Click to copy
Marquis, R. J. (2004). Herbivores rule. Science, 305, 619–621.

Chicago/Turabian   Click to copy
Marquis, Robert J. “Herbivores Rule.” Science 305 (2004): 619–621.

MLA   Click to copy
Marquis, Robert J. “Herbivores Rule.” Science, vol. 305, American Association for the Advancement of Science, 2004, pp. 619–21.

@article{marquis2004a,
  title = {Herbivores rule},
  year = {2004},
  journal = {Science},
  pages = {619--621},
  publisher = {American Association for the Advancement of Science},
  volume = {305},
  author = {Marquis, Robert J}
}