Sogge, M. K., Kus, B. E., Sferra, S. J., & Whitfield, M. J. (2003). Ecology and conservation of the willow flycatcher. Cooper Ornithological Society.
Chicago-viite (17. p.)Sogge, Mark K., Barbara E. Kus, Susan J. Sferra, ja Mary J. Whitfield. Ecology and Conservation of the Willow Flycatcher. Riverside, California, USA: Cooper Ornithological Society, 2003.
MLA-viite (9. p.)Sogge, Mark K., et al. Ecology and Conservation of the Willow Flycatcher. Cooper Ornithological Society, 2003.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.