APA   Click to copy
Koh, L. P., Dunn, R. R., Sodhi, N. S., Colwell, R. K., Proctor, H. C., & Smith, V. S. (2004). Species coextinctions and the biodiversity crisis. Science, 305, 1632–1634.

Chicago/Turabian   Click to copy
Koh, Lian Pin, Robert R Dunn, Navjot S Sodhi, Robert K Colwell, Heather C Proctor, and Vincent S Smith. “Species Coextinctions and the Biodiversity Crisis.” science 305 (2004): 1632–1634.

MLA   Click to copy
Koh, Lian Pin, et al. “Species Coextinctions and the Biodiversity Crisis.” Science, vol. 305, American Association for the Advancement of Science, 2004, pp. 1632–34.

@article{koh2004a,
  title = {Species coextinctions and the biodiversity crisis},
  year = {2004},
  journal = {science},
  pages = {1632--1634},
  publisher = {American Association for the Advancement of Science},
  volume = {305},
  author = {Koh, Lian Pin and Dunn, Robert R and Sodhi, Navjot S and Colwell, Robert K and Proctor, Heather C and Smith, Vincent S}
}