Burfield, I., Bommel, F. v., Gallo-Orsi, U., & Nagy, S. (2004). Birds in Europe: Population estimates, trends and conservation status. Cambridge: BirdLife International.
Chicago Style CitationBurfield, Ian., Franz van Bommel, Umberto Gallo-Orsi, and Szabolcs Nagy. Birds in Europe: Population Estimates, Trends and Conservation Status. Cambridge: BirdLife International, 2004.
MLA引文Burfield, Ian., Franz van Bommel, Umberto Gallo-Orsi, and Szabolcs Nagy. Birds in Europe: Population Estimates, Trends and Conservation Status. Cambridge: BirdLife International, 2004.
警告：这些引文格式不一定是100％准确.