British Trust for Ornithology, Nature Conservancy Council (Great Britain), & Marchant, J. H. (1990). Population trends in British breeding birds. British Trust for Ornithology.
Chicago Style (17th ed.) CitationBritish Trust for Ornithology, Nature Conservancy Council (Great Britain), and John H. Marchant. Population Trends in British Breeding Birds. Tring, Hertfordshire, U.K.: British Trust for Ornithology, 1990.
MLA (9th ed.) CitationBritish Trust for Ornithology, et al. Population Trends in British Breeding Birds. British Trust for Ornithology, 1990.
Warning: These citations may not always be 100% accurate.