APA   Click to copy
Colwell, R. K., Rahbek, C., & Gotelli, N. J. (2004). The mid-domain effect and species richness patterns: What have we learned so far? The American Naturalist, 163, E1–E23.

Chicago/Turabian   Click to copy
Colwell, Robert K, Carsten Rahbek, and Nicholas J Gotelli. “The Mid-Domain Effect and Species Richness Patterns: What Have We Learned so Far?” The American Naturalist 163 (2004): E1–E23.

MLA   Click to copy
Colwell, Robert K., et al. “The Mid-Domain Effect and Species Richness Patterns: What Have We Learned so Far?” The American Naturalist, vol. 163, 2004, pp. E1–E23.

@article{colwell2004a,
  title = {The mid-domain effect and species richness patterns: What have we learned so far?},
  year = {2004},
  journal = {The American Naturalist},
  pages = {E1--E23},
  volume = {163},
  author = {Colwell, Robert K and Rahbek, Carsten and Gotelli, Nicholas J}
}