APA   Click to copy
Mahoney, S. M., Reudink, M., Pasch, B., & Theimer, T. (2020). Song but not plumage varies geographically among willow flycatcher Empidonax traillii subspecies. Journal of Avian Biology.

Chicago/Turabian   Click to copy
Mahoney, S. M., M. Reudink, B. Pasch, and T. Theimer. “Song but Not Plumage Varies Geographically among Willow Flycatcher Empidonax Traillii Subspecies.” Journal of Avian Biology (2020).

MLA   Click to copy
Mahoney, S. M., et al. “Song but Not Plumage Varies Geographically among Willow Flycatcher Empidonax Traillii Subspecies.” Journal of Avian Biology, 2020.

@article{s2020a,
  title = {Song but not plumage varies geographically among willow flycatcher
   Empidonax traillii
   subspecies},
  year = {2020},
  journal = {Journal of Avian Biology},
  author = {Mahoney, S. M. and Reudink, M. and Pasch, B. and Theimer, T.}
}