APA   Click to copy
Colwell, R. K., & Lees, D. C. (2000). The mid-domain effect: geometric constraints on the geography of species richness. Trends in Ecology \&Amp; Evolution, 15, 70–76.

Chicago/Turabian   Click to copy
Colwell, Robert K, and David C Lees. “The Mid-Domain Effect: Geometric Constraints on the Geography of Species Richness.” Trends in ecology \& evolution 15 (2000): 70–76.

MLA   Click to copy
Colwell, Robert K., and David C. Lees. “The Mid-Domain Effect: Geometric Constraints on the Geography of Species Richness.” Trends in Ecology \&Amp; Evolution, vol. 15, Elsevier Current Trends, 2000, pp. 70–76.

@article{colwell2000a,
  title = {The mid-domain effect: geometric constraints on the geography of species richness},
  year = {2000},
  journal = {Trends in ecology \& evolution},
  pages = {70--76},
  publisher = {Elsevier Current Trends},
  volume = {15},
  author = {Colwell, Robert K and Lees, David C}
}