Fox, A. D., Ogilvie, M. A., Forrester, R. (red.), Andrews, I. J. (red.), McInerny, C. J. (red.), Murray, R. D. (red.), McGowan, R. Y. (red.), Zonfrillo, B. (red.), Betts, M. W. (red.), Jardine, D. C. (red.) & Grundy, D. S. (red.) (2007).
Long-tailed Duck. I R. Forrester, I. J. Andrews, C. J. McInerny, R. D. Murray, R. Y. McGowan, B. Zonfrillo, M. W. Betts, D. C. Jardine & D. S. Grundy (red.),
The Birds of Scotland (s. 254-257). Aberlady: Scottish Ornithologists' Club.
