APA   Click to copy
Feinsinger, P., Colwell, R. K., Terborgh, J., & Chaplin, S. B. (1979). Elevation and the morphology, flight energetics, and foraging ecology of tropical hummingbirds. The American Naturalist, 113, 481–497.

Chicago/Turabian   Click to copy
Feinsinger, Peter, Robert K Colwell, John Terborgh, and Susan Budd Chaplin. “Elevation and the Morphology, Flight Energetics, and Foraging Ecology of Tropical Hummingbirds.” The American Naturalist 113 (1979): 481–497.

MLA   Click to copy
Feinsinger, Peter, et al. “Elevation and the Morphology, Flight Energetics, and Foraging Ecology of Tropical Hummingbirds.” The American Naturalist, vol. 113, University of Chicago Press, 1979, pp. 481–97.

@article{feinsinger1979a,
  title = {Elevation and the morphology, flight energetics, and foraging ecology of tropical hummingbirds},
  year = {1979},
  journal = {The American Naturalist},
  pages = {481--497},
  publisher = {University of Chicago Press},
  volume = {113},
  author = {Feinsinger, Peter and Colwell, Robert K and Terborgh, John and Chaplin, Susan Budd}
}