Okill, David; Shaw, Deryk. Fair Isle. Archer, Mike; Grantham, Mark; Howlett, Peter; Stansfield, Steven (编). Bird Observatories of Britain and Ireland(PDF). T & A D Poyser. 2010. (原始内容(PDF)存档于2012-03-24).
Okill, David; Shaw, Deryk. Fair Isle. Archer, Mike; Grantham, Mark; Howlett, Peter; Stansfield, Steven (编). Bird Observatories of Britain and Ireland(PDF). T & A D Poyser. 2010. (原始内容(PDF)存档于2012-03-24).